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// CVE · PUBLISHED 2026-06-16

CVE-2026-12304

Mozilla / Firefox · Mozilla / Thunderbird

9.1 · CVSS 3.1Critical

Description

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.

References

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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.