CVE-2026-8975 PUBLISHED

Memory safety bugs present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150. 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 151, Firefox ESR 115.36, and Firefox ESR 140.11.

• Andrew McCreight, Valentin Gosu, Nika Layzell, Tom Schuster and the Mozilla Fuzzing Team

• Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151
• https://www.mozilla.org/security/advisories/mfsa2026-46/
• https://www.mozilla.org/security/advisories/mfsa2026-47/
• https://www.mozilla.org/security/advisories/mfsa2026-48/