Mozilla Firefox ESR 115.35/140.10/150 Mem Safety Bug (CVE-2026-8975)
CVE-2026-8975 Published on May 19, 2026
Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151
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.
Vulnerability Analysis
CVE-2026-8975 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Buffer Overflow Vulnerability?
The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.
CVE-2026-8975 has been classified to as a Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2026-8975
Want to know whenever a new CVE is published for Mozilla Firefox? stack.watch will email you.
Affected Versions
Mozilla Firefox:- Version 115.36, <= 115.* is unaffected.
- Version 140.11, <= 140.* is unaffected.
- Version 151, <= * is unaffected.