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VULNERABILITIES

CVE-2026-117929 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

Metrics

CVSS 3.x Severity and Vector Strings:

NDDVolerionCVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CNA: CISA-ADPCVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=2081549 [email protected]Issue TrackingPermission RequiredVendor
https://www.mozilla.org/security/advisories/mfsa2026-118/ [email protected]AdvisoryBundleRemedyVendor
https://www.mozilla.org/security/advisories/mfsa2026-119/ [email protected]AdvisoryBundleVendor
https://www.mozilla.org/security/advisories/mfsa2026-120/ [email protected]AdvisoryBundleVendor
https://www.mozilla.org/security/advisories/mfsa2026-121/ [email protected]

see all 6 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-416Use After FreeCISA-ADP

Affected Products

ProductVersions
Mozilla Firefox
All versions

CPE

  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

Remediation

  • Upgrade: 159moderate effort
  • Upgrade: 115.44moderate effort
  • Upgrade: 153.6moderate effort

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-117929
NVD Published Date:
Oct 27, 2026
NVD Last Modified:
Nov 4, 2026
Source:
[email protected]
CVE-2026-117929 Details - Not Deferred