Vulnerability in Mozilla Firefox
CVE-2026-12291
Use-after-free in the Networking: HTTP component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
Affected products
- Mozilla Firefox — versions 115.37, 140.12, 152
- Mozilla Thunderbird — versions 140.12, 152