CVE-2026-12321

Impact

JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

Affected products

Weakness classification

References

• NVD record
• CVE.org record
• https://bugzilla.mozilla.org/show_bug.cgi?id=2032943
• https://www.mozilla.org/security/advisories/mfsa2026-57/
• https://www.mozilla.org/security/advisories/mfsa2026-60/