PT-2026-61873 · Mozilla · Firefox

CVE-2026-16361 · Published 2026-07-21 · Updated 2026-07-21

NVD

CVSS v3.1

9.8

Critical

Base vector

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

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.

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2026-16361

Affected Products

Firefox

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-16361 · Security Note
• https://mozilla.org/security/advisories/mfsa2026-69 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2026-70 · Vendor Advisory
• https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029734%2C2036518 · Note