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VULNERABILITIES

CVE-2026-100791 Details

Description

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

Metrics

CVSS 3.x Severity and Vector Strings:

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

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=2072433 [email protected]
https://www.mozilla.org/security/advisories/mfsa2026-100/ [email protected]
https://www.mozilla.org/security/advisories/mfsa2026-101/ [email protected]
https://www.mozilla.org/security/advisories/mfsa2026-102/ [email protected]
https://www.mozilla.org/security/advisories/mfsa2026-103/ [email protected]

see all 8 references

Weakness Enumeration

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

Affected Products

No affected product data is available for this CVE.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-100791
NVD Published Date:
Sep 29, 2026
NVD Last Modified:
Sep 30, 2026
Source:
[email protected]
CVE-2026-100791 Details - Not Deferred