CVE-2026-16361

CRITICAL CVSS 9.8 View on NVD ↗

Description

Memory safety bugs present in Firefox ESR 115.37 and Firefox ESR 140.12. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 115.38 and Firefox ESR 140.13.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029734%2C2036518
https://www.mozilla.org/security/advisories/mfsa2026-69/
https://www.mozilla.org/security/advisories/mfsa2026-70/

Published: Jul 21, 2026 13:17 UTC Modified: Jul 21, 2026 19:17 UTC