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Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability...

zetlyn/cve-ghsa vulnerability ghsa GHSA-cm7f-mvvg-gwpr cve CVE-2026-100770 known 2026-09-29

https://github.com/advisories/GHSA-cm7f-mvvg-gwpr

Properties

cvss9.6
receipt
Source
GitHub advisories
Its words
9.6
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-2026-100770",
  "cvss": {
    "score": 9.6,
    "vector_string": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"
  },
  "cvss_severities": {
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      "score": 9.6,
      "vector_string": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"
    },
    "cvss_v4": {
      "score": 0.0,
      "vector_string": null
    }
  },
  "cwes": [
    {
      "cwe_id": "CWE-416",
      "name": "Use After Free"
    }
  ],
  "description": "Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.",
  "epss": {
    "percentage": 0.0034,
    "percentile": 0.251
  },
  "ghsa_id": "GHSA-cm7f-mvvg-gwpr",
  "github_reviewed_at": null,
  "html_url": "https://github.com/advisories/GHSA-cm7f-mvvg-gwpr",
  "identifiers": [
    {
      "type": "GHSA",
      "value": "GHSA-cm7f-mvvg-gwpr"
    },
    {
      "type": "CVE",
      "value": "CVE-2026-100770"
    }
  ],
  "nvd_published_at": "2026-09-29T13:17:41Z",
  "published_at": "2026-09-29T15:31:21Z",
  "references": [
    "https://nvd.nist.gov/vuln/detail/CVE-2026-100770",
    "https://bugzilla.mozilla.org/show_bug.cgi?id=2068322",
    "https://www.mozilla.org/security/advisories/mfsa2026-100",
    "https://www.mozilla.org/security/advisories/mfsa2026-97",
    "https://www.mozilla.org/security/advisories/mfsa2026-98",
    "https://www.mozilla.org/security/advisories/mfsa2026-99",
    "https://www.mozilla.org/security/advisories/mfsa2026-101",
    "https://www.mozilla.org/security/advisories/mfsa2026-102",
    "https://www.mozilla.org/security/advisories/mfsa2026-103",
    "https://github.com/advisories/GHSA-cm7f-mvvg-gwpr"
  ],
  "repository_advisory_url": null,
  "severity": "critical",
  "source_code_location": "",
  "summary": "Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability...",
  "type": "unreviewed",
  "updated_at": "2026-09-30T18:33:10Z",
  "url": "https://api.github.com/advisories/GHSA-cm7f-mvvg-gwpr",
  "vulnerabilities": [],
  "withdrawn_at": null
}
cweCWE-416
receipt
Source
GitHub advisories
Its words
CWE-416
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-2026-100770",
  "cvss": {
    "score": 9.6,
    "vector_string": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"
  },
  "cvss_severities": {
    "cvss_v3": {
      "score": 9.6,
      "vector_string": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"
    },
    "cvss_v4": {
      "score": 0.0,
      "vector_string": null
    }
  },
  "cwes": [
    {
      "cwe_id": "CWE-416",
      "name": "Use After Free"
    }
  ],
  "description": "Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.",
  "epss": {
    "percentage": 0.0034,
    "percentile": 0.251
  },
  "ghsa_id": "GHSA-cm7f-mvvg-gwpr",
  "github_reviewed_at": null,
  "html_url": "https://github.com/advisories/GHSA-cm7f-mvvg-gwpr",
  "identifiers": [
    {
      "type": "GHSA",
      "value": "GHSA-cm7f-mvvg-gwpr"
    },
    {
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      "value": "CVE-2026-100770"
    }
  ],
  "nvd_published_at": "2026-09-29T13:17:41Z",
  "published_at": "2026-09-29T15:31:21Z",
  "references": [
    "https://nvd.nist.gov/vuln/detail/CVE-2026-100770",
    "https://bugzilla.mozilla.org/show_bug.cgi?id=2068322",
    "https://www.mozilla.org/security/advisories/mfsa2026-100",
    "https://www.mozilla.org/security/advisories/mfsa2026-97",
    "https://www.mozilla.org/security/advisories/mfsa2026-98",
    "https://www.mozilla.org/security/advisories/mfsa2026-99",
    "https://www.mozilla.org/security/advisories/mfsa2026-101",
    "https://www.mozilla.org/security/advisories/mfsa2026-102",
    "https://www.mozilla.org/security/advisories/mfsa2026-103",
    "https://github.com/advisories/GHSA-cm7f-mvvg-gwpr"
  ],
  "repository_advisory_url": null,
  "severity": "critical",
  "source_code_location": "",
  "summary": "Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability...",
  "type": "unreviewed",
  "updated_at": "2026-09-30T18:33:10Z",
  "url": "https://api.github.com/advisories/GHSA-cm7f-mvvg-gwpr",
  "vulnerabilities": [],
  "withdrawn_at": null
}
severitycritical
GitHub's own rating, from the CVSS base score at 9.0 and above.
receipt
Source
GitHub advisories
Its words
critical
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-2026-100770",
  "cvss": {
    "score": 9.6,
    "vector_string": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"
  },
  "cvss_severities": {
    "cvss_v3": {
      "score": 9.6,
      "vector_string": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"
    },
    "cvss_v4": {
      "score": 0.0,
      "vector_string": null
    }
  },
  "cwes": [
    {
      "cwe_id": "CWE-416",
      "name": "Use After Free"
    }
  ],
  "description": "Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.",
  "epss": {
    "percentage": 0.0034,
    "percentile": 0.251
  },
  "ghsa_id": "GHSA-cm7f-mvvg-gwpr",
  "github_reviewed_at": null,
  "html_url": "https://github.com/advisories/GHSA-cm7f-mvvg-gwpr",
  "identifiers": [
    {
      "type": "GHSA",
      "value": "GHSA-cm7f-mvvg-gwpr"
    },
    {
      "type": "CVE",
      "value": "CVE-2026-100770"
    }
  ],
  "nvd_published_at": "2026-09-29T13:17:41Z",
  "published_at": "2026-09-29T15:31:21Z",
  "references": [
    "https://nvd.nist.gov/vuln/detail/CVE-2026-100770",
    "https://bugzilla.mozilla.org/show_bug.cgi?id=2068322",
    "https://www.mozilla.org/security/advisories/mfsa2026-100",
    "https://www.mozilla.org/security/advisories/mfsa2026-97",
    "https://www.mozilla.org/security/advisories/mfsa2026-98",
    "https://www.mozilla.org/security/advisories/mfsa2026-99",
    "https://www.mozilla.org/security/advisories/mfsa2026-101",
    "https://www.mozilla.org/security/advisories/mfsa2026-102",
    "https://www.mozilla.org/security/advisories/mfsa2026-103",
    "https://github.com/advisories/GHSA-cm7f-mvvg-gwpr"
  ],
  "repository_advisory_url": null,
  "severity": "critical",
  "source_code_location": "",
  "summary": "Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability...",
  "type": "unreviewed",
  "updated_at": "2026-09-30T18:33:10Z",
  "url": "https://api.github.com/advisories/GHSA-cm7f-mvvg-gwpr",
  "vulnerabilities": [],
  "withdrawn_at": null
}

Text

Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability... Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.