CVE-2026-92021

Impact

Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 140.16 and Thunderbird 140.16.

Affected products

Weakness classification

References

• NVD record
• CVE.org record
• https://bugzilla.mozilla.org/show_bug.cgi?id=2067208
• https://www.mozilla.org/security/advisories/mfsa2026-92/
• https://www.mozilla.org/security/advisories/mfsa2026-95/