CVE-2026-6754

Description

Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2027541
• https://www.mozilla.org/security/advisories/mfsa2026-30/
• https://www.mozilla.org/security/advisories/mfsa2026-31/
• https://www.mozilla.org/security/advisories/mfsa2026-32/