CVE-2026-12304 — Same-origin policy bypass in the Networking: Cookies component
Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
Published: 2026-06-16 · CVSS: 9.1 · CVSS 3.1
Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7