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In JetBrains TeamCity before 2026.2, 2026.1.4, 2025.11.8 administrator account takeover was...

zetlyn/cve-ghsa vulnerability ghsa GHSA-4858-hf6j-x5pg cve CVE-2026-100255 known 2026-09-30

https://github.com/advisories/GHSA-4858-hf6j-x5pg

Properties

cvss8.1
receipt
Source
GitHub advisories
Its words
8.1
Read by
field:cvss.score
Said since
2026-10-02 11:59 UTC
Last answered
2026-10-06 13:46 UTC
Original
open at the source
What the source handed over
{
  "credits": [],
  "cve_id": "CVE-2026-100255",
  "cvss": {
    "score": 8.1,
    "vector_string": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  },
  "cvss_severities": {
    "cvss_v3": {
      "score": 8.1,
      "vector_string": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
    },
    "cvss_v4": {
      "score": 0.0,
      "vector_string": null
    }
  },
  "cwes": [
    {
      "cwe_id": "CWE-1289",
      "name": "Improper Validation of Unsafe Equivalence in Input"
    }
  ],
  "description": "In JetBrains TeamCity before 2026.2, \n2026.1.4, \n2025.11.8 administrator account takeover was possible via password reset",
  "epss": {
    "percentage": 0.00431,
    "percentile": 0.35004
  },
  "ghsa_id": "GHSA-4858-hf6j-x5pg",
  "github_reviewed_at": null,
  "html_url": "https://github.com/advisories/GHSA-4858-hf6j-x5pg",
  "identifiers": [
    {
      "type": "GHSA",
      "value": "GHSA-4858-hf6j-x5pg"
    },
    {
      "type": "CVE",
      "value": "CVE-2026-100255"
    }
  ],
  "nvd_published_at": "2026-09-30T16:16:56Z",
  "published_at": "2026-09-30T18:33:30Z",
  "references": [
    "https://nvd.nist.gov/vuln/detail/CVE-2026-100255",
    "https://www.jetbrains.com/privacy-security/issues-fixed",
    "https://github.com/advisories/GHSA-4858-hf6j-x5pg"
  ],
  "repository_advisory_url": null,
  "severity": "high",
  "source_code_location": "",
  "summary": "In JetBrains TeamCity before 2026.2, \n2026.1.4, \n2025.11.8 administrator account takeover was...",
  "type": "unreviewed",
  "updated_at": "2026-09-30T18:33:39Z",
  "url": "https://api.github.com/advisories/GHSA-4858-hf6j-x5pg",
  "vulnerabilities": [],
  "withdrawn_at": null
}
cweCWE-1289
receipt
Source
GitHub advisories
Its words
CWE-1289
Read by
field:cwes[].cwe_id
Said since
2026-10-02 11:59 UTC
Last answered
2026-10-06 13:46 UTC
Original
open at the source
What the source handed over
{
  "credits": [],
  "cve_id": "CVE-2026-100255",
  "cvss": {
    "score": 8.1,
    "vector_string": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  },
  "cvss_severities": {
    "cvss_v3": {
      "score": 8.1,
      "vector_string": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
    },
    "cvss_v4": {
      "score": 0.0,
      "vector_string": null
    }
  },
  "cwes": [
    {
      "cwe_id": "CWE-1289",
      "name": "Improper Validation of Unsafe Equivalence in Input"
    }
  ],
  "description": "In JetBrains TeamCity before 2026.2, \n2026.1.4, \n2025.11.8 administrator account takeover was possible via password reset",
  "epss": {
    "percentage": 0.00431,
    "percentile": 0.35004
  },
  "ghsa_id": "GHSA-4858-hf6j-x5pg",
  "github_reviewed_at": null,
  "html_url": "https://github.com/advisories/GHSA-4858-hf6j-x5pg",
  "identifiers": [
    {
      "type": "GHSA",
      "value": "GHSA-4858-hf6j-x5pg"
    },
    {
      "type": "CVE",
      "value": "CVE-2026-100255"
    }
  ],
  "nvd_published_at": "2026-09-30T16:16:56Z",
  "published_at": "2026-09-30T18:33:30Z",
  "references": [
    "https://nvd.nist.gov/vuln/detail/CVE-2026-100255",
    "https://www.jetbrains.com/privacy-security/issues-fixed",
    "https://github.com/advisories/GHSA-4858-hf6j-x5pg"
  ],
  "repository_advisory_url": null,
  "severity": "high",
  "source_code_location": "",
  "summary": "In JetBrains TeamCity before 2026.2, \n2026.1.4, \n2025.11.8 administrator account takeover was...",
  "type": "unreviewed",
  "updated_at": "2026-09-30T18:33:39Z",
  "url": "https://api.github.com/advisories/GHSA-4858-hf6j-x5pg",
  "vulnerabilities": [],
  "withdrawn_at": null
}
severityhigh
From 7.0 to 8.9.
receipt
Source
GitHub advisories
Its words
high
Read by
field:severity
Said since
2026-10-02 11:59 UTC
Last answered
2026-10-06 13:46 UTC
Original
open at the source
What the source handed over
{
  "credits": [],
  "cve_id": "CVE-2026-100255",
  "cvss": {
    "score": 8.1,
    "vector_string": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  },
  "cvss_severities": {
    "cvss_v3": {
      "score": 8.1,
      "vector_string": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
    },
    "cvss_v4": {
      "score": 0.0,
      "vector_string": null
    }
  },
  "cwes": [
    {
      "cwe_id": "CWE-1289",
      "name": "Improper Validation of Unsafe Equivalence in Input"
    }
  ],
  "description": "In JetBrains TeamCity before 2026.2, \n2026.1.4, \n2025.11.8 administrator account takeover was possible via password reset",
  "epss": {
    "percentage": 0.00431,
    "percentile": 0.35004
  },
  "ghsa_id": "GHSA-4858-hf6j-x5pg",
  "github_reviewed_at": null,
  "html_url": "https://github.com/advisories/GHSA-4858-hf6j-x5pg",
  "identifiers": [
    {
      "type": "GHSA",
      "value": "GHSA-4858-hf6j-x5pg"
    },
    {
      "type": "CVE",
      "value": "CVE-2026-100255"
    }
  ],
  "nvd_published_at": "2026-09-30T16:16:56Z",
  "published_at": "2026-09-30T18:33:30Z",
  "references": [
    "https://nvd.nist.gov/vuln/detail/CVE-2026-100255",
    "https://www.jetbrains.com/privacy-security/issues-fixed",
    "https://github.com/advisories/GHSA-4858-hf6j-x5pg"
  ],
  "repository_advisory_url": null,
  "severity": "high",
  "source_code_location": "",
  "summary": "In JetBrains TeamCity before 2026.2, \n2026.1.4, \n2025.11.8 administrator account takeover was...",
  "type": "unreviewed",
  "updated_at": "2026-09-30T18:33:39Z",
  "url": "https://api.github.com/advisories/GHSA-4858-hf6j-x5pg",
  "vulnerabilities": [],
  "withdrawn_at": null
}

Text

In JetBrains TeamCity before 2026.2, 2026.1.4, 2025.11.8 administrator account takeover was... In JetBrains TeamCity before 2026.2, 2026.1.4, 2025.11.8 administrator account takeover was possible via password reset