CVE-2026-2797

Use-after-free in the JavaScript: GC component

CVSS 8.8 HIGHEPSS 0.3%CWE-416

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.8EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

24 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

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

Affected products

Mozilla · Firefox Mozilla · Thunderbird

References

https://access.redhat.com/security/cve/CVE-2026-2797 https://bugzilla.mozilla.org/show_bug.cgi?id=2013561 https://bugzilla.redhat.com/show_bug.cgi?id=2442330 https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2797.json https://www.mozilla.org/security/advisories/mfsa2026-13/https://www.mozilla.org/security/advisories/mfsa2026-16/