org.apache.struts/struts2-core: Apache Struts: Denial of Service via resource amplification in tag library

cve CVE-2026-104712 3 sources, 3 claims · Watch

Red Hat writes:
org.apache.struts/struts2-core: Apache Struts: Denial of Service via resource amplification in tag library the claim

Severity they disagree: unknown GitHub advisories
important Red Hat
CVSS: 7.5 Red Hat
Vendor: Apache Software Foundation NVD
Product: Apache Struts NVD
CWE: CWE-405 GitHub advisories
CWE-405 NVD
CWE-770 Red Hat

How far exploitation has got

No public code known
Proof of concept
Proof of concept, verified
A Metasploit module
Exploited in the wild
Used in ransomware campaigns

Timeline

2026-10-05	first spoke of it: Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request...	GitHub advisories
2026-10-05	first spoke of it: Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request parameter is bound to an arbitrary-precision decimal (java.math.BigDecimal) property that is then rendered through the Struts tag library, the framework can produce a response many orders of magnitude larger than the request, allowing an unauthenticated remote attacker to exhaust server CPU and outbound network capacity with sustained low-volume traffic. Applications that do not bind request parameters to BigDecimal properties, or never render such a property through the Struts tag library, are not affected. This issue affects Apache Struts: from 2.5.14 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0. Users are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue.	NVD
2026-10-05	first spoke of it: org.apache.struts/struts2-core: Apache Struts: Denial of Service via resource amplification in tag library	Red Hat

What it is to other things

In words only, so not counted until a person confirms one:

affects	`apache_software_foundation/apache_struts` NVD says “Apache Software Foundation · Apache Struts”
made_by	`apache_software_foundation` NVD says “Apache Software Foundation”

Every value, with what each source said and its receipt

Property Source Said Means here

CVSS

cvss

Red Hat

7.5

receipt

Source: Red Hat
Its words: 7.5
Read by: field:cvss3_score
Said since: 2026-10-06 13:01 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

{
  "CVE": "CVE-2026-104712",
  "CWE": "CWE-770",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2546055",
  "bugzilla_description": "org.apache.struts/struts2-core: Apache Struts: Denial of Service via resource amplification in tag library",
  "cvss3_score": "7.5",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-10-05T18:35:41Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-104712.json",
  "severity": "important"
}

—

CVSS vector

cvss_vector

Red Hat

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

receipt

Source: Red Hat
Its words: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Read by: field:cvss3_scoring_vector
Said since: 2026-10-06 13:01 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

{
  "CVE": "CVE-2026-104712",
  "CWE": "CWE-770",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2546055",
  "bugzilla_description": "org.apache.struts/struts2-core: Apache Struts: Denial of Service via resource amplification in tag library",
  "cvss3_score": "7.5",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-10-05T18:35:41Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-104712.json",
  "severity": "important"
}

—

CWE

cwe

different words

GitHub advisories

CWE-405

receipt

Source: GitHub advisories
Its words: CWE-405
Read by: field:cwes[].cwe_id
Said since: 2026-10-06 00:23 UTC
Last answered: 2026-10-06 13:46 UTC
Original: open at the source

What the source handed over

{
  "comments": 0,
  "credits": [],
  "cve_id": "CVE-2026-104712",
  "cvss": {
    "score": null,
    "vector_string": null
  },
  "cvss_severities": {
    "cvss_v3": {
      "score": 0.0,
      "vector_string": null
    },
    "cvss_v4": {
      "score": 0.0,
      "vector_string": null
    }
  },
  "cwes": [
    {
      "cwe_id": "CWE-405",
      "name": "Asymmetric Resource Consumption (Amplification)"
    }
  ],
  "description": "Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request parameter is bound to an arbitrary-precision decimal (java.math.BigDecimal) property that is then rendered through the Struts tag library, the framework can produce a response many orders of magnitude larger than the request, allowing an unauthenticated remote attacker to exhaust server CPU and outbound network capacity with sustained low-volume traffic. Applications that do not bind request parameters to BigDecimal properties, or never render such a property through the Struts tag library, are not affected.\n\nThis issue affects Apache Struts: from 2.5.14 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0.\n\nUsers are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue.",
  "ghsa_id": "GHSA-8536-jvj9-v78f",
  "github_reviewed_at": null,
  "html_url": "https://github.com/advisories/GHSA-8536-jvj9-v78f",
  "identifiers": [
    {
      "type": "GHSA",
      "value": "GHSA-8536-jvj9-v78f"
    },
    {
      "type": "CVE",
      "value": "CVE-2026-104712"
    }
  ],
  "nvd_published_at": "2026-10-05T19:17:14Z",
  "published_at": "2026-10-05T21:31:34Z",
  "references": [
    "https://nvd.nist.gov/vuln/detail/CVE-2026-104712",
    "https://cwiki.apache.org/confluence/display/WW/S2-076",
    "http://www.openwall.com/lists/oss-security/2026/10/05/11",
    "https://github.com/advisories/GHSA-8536-jvj9-v78f"
  ],
  "repository_advisory_url": null,
  "severity": "unknown",
  "source_code_location": "",
  "summary": "Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request...",
  "type": "unreviewed",
  "updated_at": "2026-10-05T21:31:38Z",
  "url": "https://api.github.com/advisories/GHSA-8536-jvj9-v78f",
  "vulnerabilities": [],
  "withdrawn_at": null
}

—

CWE

cwe

different words

NVD

CWE-405

receipt

Source: NVD
Its words: CWE-405
Read by: field:cve.weaknesses[].description[].value
Said since: 2026-10-06 12:31 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

2026-10-06 12:31 UTC	CWE-405
2026-10-06 00:34 UTC	—

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "collectionURL": "https://repo.maven.apache.org/maven2",
            "defaultStatus": "unaffected",
            "packageName": "org.apache.struts:struts2-core",
            "packageURL": "pkg:maven/org.apache.struts/struts2-core",
            "product": "Apache Struts",
            "vendor": "Apache Software Foundation",
            "versions": [
              {
                "lessThanOrEqual": "2.5.33",
                "status": "affected",
                "version": "2.5.14",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.11.0",
                "status": "affected",
                "version": "6.0.0",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "7.3.0",
                "status": "affected",
                "version": "7.0.0",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "security@apache.org"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request parameter is bound to an arbitrary-precision decimal (java.math.BigDecimal) property that is then rendered through the Struts tag library, the framework can produce a response many orders of magnitude larger than the request, allowing an unauthenticated remote attacker to exhaust server CPU and outbound network capacity with sustained low-volume traffic. Applications that do not bind request parameters to BigDecimal properties, or never render such a property through the Struts tag library, are not affected.\n\nThis issue affects Apache Struts: from 2.5.14 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0.\n\nUsers are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue."
      }
    ],
    "id": "CVE-2026-104712",
    "lastModified": "2026-10-05T20:17:08.940",
    "metrics": {},
    "published": "2026-10-05T19:17:14.630",
    "references": [
      {
        "source": "security@apache.org",
        "url": "https://cwiki.apache.org/confluence/display/WW/S2-076"
      },
      {
        "source": "af854a3a-2127-422b-91ae-364da2661108",
        "url": "http://www.openwall.com/lists/oss-security/2026/10/05/11"
      }
    ],
    "sourceIdentifier": "security@apache.org",
    "vulnStatus": "Received",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-405"
          }
        ],
        "source": "security@apache.org",
        "type": "Secondary"
      }
    ]
  }
}

—

CWE

cwe

different words

Red Hat

CWE-770

receipt

Source: Red Hat
Its words: CWE-770
Read by: field:CWE
Said since: 2026-10-06 13:01 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

{
  "CVE": "CVE-2026-104712",
  "CWE": "CWE-770",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2546055",
  "bugzilla_description": "org.apache.struts/struts2-core: Apache Struts: Denial of Service via resource amplification in tag library",
  "cvss3_score": "7.5",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-10-05T18:35:41Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-104712.json",
  "severity": "important"
}

—

Product

product

NVD

Apache Struts

receipt

Source: NVD
Its words: Apache Struts
Read by: field:cve.affected[].affectedData[].product
Said since: 2026-10-06 00:34 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "collectionURL": "https://repo.maven.apache.org/maven2",
            "defaultStatus": "unaffected",
            "packageName": "org.apache.struts:struts2-core",
            "packageURL": "pkg:maven/org.apache.struts/struts2-core",
            "product": "Apache Struts",
            "vendor": "Apache Software Foundation",
            "versions": [
              {
                "lessThanOrEqual": "2.5.33",
                "status": "affected",
                "version": "2.5.14",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.11.0",
                "status": "affected",
                "version": "6.0.0",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "7.3.0",
                "status": "affected",
                "version": "7.0.0",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "security@apache.org"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request parameter is bound to an arbitrary-precision decimal (java.math.BigDecimal) property that is then rendered through the Struts tag library, the framework can produce a response many orders of magnitude larger than the request, allowing an unauthenticated remote attacker to exhaust server CPU and outbound network capacity with sustained low-volume traffic. Applications that do not bind request parameters to BigDecimal properties, or never render such a property through the Struts tag library, are not affected.\n\nThis issue affects Apache Struts: from 2.5.14 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0.\n\nUsers are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue."
      }
    ],
    "id": "CVE-2026-104712",
    "lastModified": "2026-10-05T20:17:08.940",
    "metrics": {},
    "published": "2026-10-05T19:17:14.630",
    "references": [
      {
        "source": "security@apache.org",
        "url": "https://cwiki.apache.org/confluence/display/WW/S2-076"
      },
      {
        "source": "af854a3a-2127-422b-91ae-364da2661108",
        "url": "http://www.openwall.com/lists/oss-security/2026/10/05/11"
      }
    ],
    "sourceIdentifier": "security@apache.org",
    "vulnStatus": "Received",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-405"
          }
        ],
        "source": "security@apache.org",
        "type": "Secondary"
      }
    ]
  }
}

—

Severity

severity

conflict

GitHub advisories

unknown

receipt

Source: GitHub advisories
Its words: unknown
Read by: field:severity
Said since: 2026-10-06 00:23 UTC
Last answered: 2026-10-06 13:46 UTC
Original: open at the source

What the source handed over

{
  "comments": 0,
  "credits": [],
  "cve_id": "CVE-2026-104712",
  "cvss": {
    "score": null,
    "vector_string": null
  },
  "cvss_severities": {
    "cvss_v3": {
      "score": 0.0,
      "vector_string": null
    },
    "cvss_v4": {
      "score": 0.0,
      "vector_string": null
    }
  },
  "cwes": [
    {
      "cwe_id": "CWE-405",
      "name": "Asymmetric Resource Consumption (Amplification)"
    }
  ],
  "description": "Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request parameter is bound to an arbitrary-precision decimal (java.math.BigDecimal) property that is then rendered through the Struts tag library, the framework can produce a response many orders of magnitude larger than the request, allowing an unauthenticated remote attacker to exhaust server CPU and outbound network capacity with sustained low-volume traffic. Applications that do not bind request parameters to BigDecimal properties, or never render such a property through the Struts tag library, are not affected.\n\nThis issue affects Apache Struts: from 2.5.14 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0.\n\nUsers are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue.",
  "ghsa_id": "GHSA-8536-jvj9-v78f",
  "github_reviewed_at": null,
  "html_url": "https://github.com/advisories/GHSA-8536-jvj9-v78f",
  "identifiers": [
    {
      "type": "GHSA",
      "value": "GHSA-8536-jvj9-v78f"
    },
    {
      "type": "CVE",
      "value": "CVE-2026-104712"
    }
  ],
  "nvd_published_at": "2026-10-05T19:17:14Z",
  "published_at": "2026-10-05T21:31:34Z",
  "references": [
    "https://nvd.nist.gov/vuln/detail/CVE-2026-104712",
    "https://cwiki.apache.org/confluence/display/WW/S2-076",
    "http://www.openwall.com/lists/oss-security/2026/10/05/11",
    "https://github.com/advisories/GHSA-8536-jvj9-v78f"
  ],
  "repository_advisory_url": null,
  "severity": "unknown",
  "source_code_location": "",
  "summary": "Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request...",
  "type": "unreviewed",
  "updated_at": "2026-10-05T21:31:38Z",
  "url": "https://api.github.com/advisories/GHSA-8536-jvj9-v78f",
  "vulnerabilities": [],
  "withdrawn_at": null
}

—

Severity

severity

conflict

Red Hat

important

A flaw that can easily compromise confidentiality, integrity or availability.

receipt

Source: Red Hat
Its words: important
Read by: field:severity
Said since: 2026-10-06 13:01 UTC
Last answered: 2026-10-06 13:02 UTC
Original: open at the source

What the source handed over

{
  "CVE": "CVE-2026-104712",
  "CWE": "CWE-770",
  "advisories": [],
  "affected_packages": [],
  "bugzilla": "2546055",
  "bugzilla_description": "org.apache.struts/struts2-core: Apache Struts: Denial of Service via resource amplification in tag library",
  "cvss3_score": "7.5",
  "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "cvss_score": null,
  "cvss_scoring_vector": null,
  "package_state": null,
  "public_date": "2026-10-05T18:35:41Z",
  "resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-104712.json",
  "severity": "important"
}

high

Status

status

NVD

Received

receipt

Source: NVD
Its words: Received
Read by: field:cve.vulnStatus
Said since: 2026-10-06 00:34 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "collectionURL": "https://repo.maven.apache.org/maven2",
            "defaultStatus": "unaffected",
            "packageName": "org.apache.struts:struts2-core",
            "packageURL": "pkg:maven/org.apache.struts/struts2-core",
            "product": "Apache Struts",
            "vendor": "Apache Software Foundation",
            "versions": [
              {
                "lessThanOrEqual": "2.5.33",
                "status": "affected",
                "version": "2.5.14",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.11.0",
                "status": "affected",
                "version": "6.0.0",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "7.3.0",
                "status": "affected",
                "version": "7.0.0",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "security@apache.org"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request parameter is bound to an arbitrary-precision decimal (java.math.BigDecimal) property that is then rendered through the Struts tag library, the framework can produce a response many orders of magnitude larger than the request, allowing an unauthenticated remote attacker to exhaust server CPU and outbound network capacity with sustained low-volume traffic. Applications that do not bind request parameters to BigDecimal properties, or never render such a property through the Struts tag library, are not affected.\n\nThis issue affects Apache Struts: from 2.5.14 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0.\n\nUsers are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue."
      }
    ],
    "id": "CVE-2026-104712",
    "lastModified": "2026-10-05T20:17:08.940",
    "metrics": {},
    "published": "2026-10-05T19:17:14.630",
    "references": [
      {
        "source": "security@apache.org",
        "url": "https://cwiki.apache.org/confluence/display/WW/S2-076"
      },
      {
        "source": "af854a3a-2127-422b-91ae-364da2661108",
        "url": "http://www.openwall.com/lists/oss-security/2026/10/05/11"
      }
    ],
    "sourceIdentifier": "security@apache.org",
    "vulnStatus": "Received",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-405"
          }
        ],
        "source": "security@apache.org",
        "type": "Secondary"
      }
    ]
  }
}

—

Vendor

vendor

NVD

Apache Software Foundation

receipt

Source: NVD
Its words: Apache Software Foundation
Read by: field:cve.affected[].affectedData[].vendor
Said since: 2026-10-06 00:34 UTC
Last answered: 2026-10-06 12:41 UTC
Original: open at the source

What the source handed over

{
  "cve": {
    "affected": [
      {
        "affectedData": [
          {
            "collectionURL": "https://repo.maven.apache.org/maven2",
            "defaultStatus": "unaffected",
            "packageName": "org.apache.struts:struts2-core",
            "packageURL": "pkg:maven/org.apache.struts/struts2-core",
            "product": "Apache Struts",
            "vendor": "Apache Software Foundation",
            "versions": [
              {
                "lessThanOrEqual": "2.5.33",
                "status": "affected",
                "version": "2.5.14",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.11.0",
                "status": "affected",
                "version": "6.0.0",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "7.3.0",
                "status": "affected",
                "version": "7.0.0",
                "versionType": "semver"
              }
            ]
          }
        ],
        "source": "security@apache.org"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request parameter is bound to an arbitrary-precision decimal (java.math.BigDecimal) property that is then rendered through the Struts tag library, the framework can produce a response many orders of magnitude larger than the request, allowing an unauthenticated remote attacker to exhaust server CPU and outbound network capacity with sustained low-volume traffic. Applications that do not bind request parameters to BigDecimal properties, or never render such a property through the Struts tag library, are not affected.\n\nThis issue affects Apache Struts: from 2.5.14 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0.\n\nUsers are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue."
      }
    ],
    "id": "CVE-2026-104712",
    "lastModified": "2026-10-05T20:17:08.940",
    "metrics": {},
    "published": "2026-10-05T19:17:14.630",
    "references": [
      {
        "source": "security@apache.org",
        "url": "https://cwiki.apache.org/confluence/display/WW/S2-076"
      },
      {
        "source": "af854a3a-2127-422b-91ae-364da2661108",
        "url": "http://www.openwall.com/lists/oss-security/2026/10/05/11"
      }
    ],
    "sourceIdentifier": "security@apache.org",
    "vulnStatus": "Received",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-405"
          }
        ],
        "source": "security@apache.org",
        "type": "Secondary"
      }
    ]
  }
}

—

Every claim, by kind

vulnerability

org.apache.struts/struts2-core: Apache Struts: Denial of Service via resource amplification in tag library zetlyn/cve-redhat · 2026-10-05	cvss 7.5 cvss_vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H cwe CWE-770 severity important	source
Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request parameter is bound to an arbitrary-precision decimal (java.math.BigDecimal) property that is then rendered through the Struts tag library, the framework can produce a response many orders of magnitude larger than the request, allowing an unauthenticated remote attacker to exhaust server CPU and outbound network capacity with sustained low-volume traffic. Applications that do not bind request parameters to BigDecimal properties, or never render such a property through the Struts tag library, are not affected. This issue affects Apache Struts: from 2.5.14 through 2.5.33, from 6.0.0 through 6.11.0, from 7.0.0 through 7.3.0. Users are recommended to upgrade to version 6.12.0 or 7.4.0, which fixes the issue. zetlyn/cve-nvd · 2026-10-05	cwe CWE-405 product Apache Struts status Received vendor Apache Software Foundation	source
Asymmetric resource consumption (amplification) vulnerability in Apache Struts. When a request... zetlyn/cve-ghsa · 2026-10-05	cwe CWE-405 severity unknown	source