CVE-2026-74962

Site isolation issue in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1...

CVE-2026-74962 Site isolation issue in the Networking: Cookies component

Site isolation issue in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1...

CVE-2026-74962

Mozilla Firefox's Networking: Cookies component has a site isolation flaw allowing cross-origin cookie access. Fixed in Firefox 154, ESR 140.14, and ESR 153.1. No exploit details are provided; users should update to the patched versions. See Mozilla advisory and bug report .