CVE-2026-124877

Description

Use-after-free in the Layout: Positioned component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.

Affected Platforms

Weakness Type

Unknown

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2081939
• https://www.mozilla.org/security/advisories/mfsa2026-125/
• https://www.mozilla.org/security/advisories/mfsa2026-126/
• https://www.mozilla.org/security/advisories/mfsa2026-127/