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CVE-2026-4723

critical · 9.8

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

9.8
CVSS
0.4%
EPSS (exploit prob.)
33rd
EPSS percentile
2026-03-24
Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-416

Affected products

VendorProductAffected versions
mozillafirefox< 149.0

Check a specific version with /api/v1/cve/match.

References

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-4723