CVE-2026-8950 is a vulnerability in Mozilla Firefox
Published on May 19, 2026
Same-origin policy bypass in the Networking: HTTP component
Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.
Products Associated with CVE-2026-8950
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Affected Versions
Mozilla Firefox:- Version 140.11, <= 140.* is unaffected.
- Version 151, <= * is unaffected.