Memory Safety Bugs in Firefox 115.37-140.12 & 152 (fixed 153 ESR)
CVE-2026-16360 Published on July 21, 2026
Memory safety bugs fixed in Firefox ESR 115.38, Firefox ESR 140.13 and Firefox 153
Memory safety bugs present in Firefox ESR 115.37, Firefox ESR 140.12 and Firefox 152. 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 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
Vulnerability Analysis
CVE-2026-16360 is exploitable 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-2026-16360 has been classified to as a Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2026-16360
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Affected Versions
Mozilla Firefox:- Version 115.38, <= 115.* is unaffected.
- Version 140.13, <= 140.* is unaffected.
- Version 153, <= * is unaffected.
- Version 140.13, <= 140.* is unaffected.
- Version 153, <= * is unaffected.