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Critical severity9.8NVD Advisory· Published Mar 24, 2026· Updated Apr 13, 2026

CVE-2026-4723

CVE-2026-4723

Description

Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.

Affected products

1

Mozilla Corporation/Firefox
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
Range: <149.0

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

3

www.mozilla.org/security/advisories/mfsa2026-20/nvdVendor Advisory
bugzilla.mozilla.org/show_bug.cginvdPermissions Required
www.mozilla.org/security/advisories/mfsa2026-23/nvd

News mentions

0

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