CVE-2026-117867
highUse-after-free in the Layout component.
Use-after-free in the Layout component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
CVSS
7.3
7.3 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
Timeline (UTC)
Published: 2026-10-27 14:16
Modified: 2026-11-04 17:17
NVD status: Deferred
Last synced 8 hours ago
Verified against the source API 2026-11-04 17:35 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2059110 security@mozilla.org
- https://www.mozilla.org/security/advisories/mfsa2026-118/ security@mozilla.org
- https://www.mozilla.org/security/advisories/mfsa2026-119/ security@mozilla.org
- https://www.mozilla.org/security/advisories/mfsa2026-120/ security@mozilla.org
- https://www.mozilla.org/security/advisories/mfsa2026-121/ security@mozilla.org
- https://www.mozilla.org/security/advisories/mfsa2026-122/ security@mozilla.org
Data sources
NVD CVE API 2.0 — fetched 2026-11-04 17:35 UTC · record ↗