CVE-2026-109729

Description

Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, and Firefox ESR 153.5.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2074632
• https://www.mozilla.org/security/advisories/mfsa2026-106/
• https://www.mozilla.org/security/advisories/mfsa2026-107/
• https://www.mozilla.org/security/advisories/mfsa2026-108/