CVE-2026-84124

Description

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

References

https://www.mozilla.org/security/advisories/mfsa2026-88/

https://www.mozilla.org/security/advisories/mfsa2026-87/

https://www.mozilla.org/security/advisories/mfsa2026-86/

https://www.mozilla.org/security/advisories/mfsa2026-85/

https://www.mozilla.org/security/advisories/mfsa2026-84/

https://www.mozilla.org/security/advisories/mfsa2026-82/

https://bugzilla.mozilla.org/show_bug.cgi?id=2061110

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3