CVE-2026-109772

CVSS 9.1 (critical) · published 2026-10-13

Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

Weakness: CWE-346

Source: NVD CVE-2026-109772

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2066063
• https://www.mozilla.org/security/advisories/mfsa2026-106/
• https://www.mozilla.org/security/advisories/mfsa2026-109/

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