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Description

Mitigation bypass in the DOM: Security component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7.

PUBLISHED Reserved 2026-01-13 | Published 2026-01-13 | Updated 2026-01-15 | Assigner mozilla

Product status

Any version before 147
affected

Any version before 115.32
affected

Any version before 140.7
affected

Any version before 147
affected

Any version before 140.7
affected

Credits

mingijung

References

bugzilla.mozilla.org/show_bug.cgi?id=1999257

www.mozilla.org/security/advisories/mfsa2026-01/

www.mozilla.org/security/advisories/mfsa2026-02/

www.mozilla.org/security/advisories/mfsa2026-03/

www.mozilla.org/security/advisories/mfsa2026-04/

www.mozilla.org/security/advisories/mfsa2026-05/

cve.org (CVE-2026-0877)

nvd.nist.gov (CVE-2026-0877)

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