CVE-2026-2785highCWE-824

CVE-2026-2785: high-severity vulnerability in Mozilla Firefox

Invalid pointer in the JavaScript Engine component

Published 24 Feb 2026 · Updated 13 Apr 2026

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.8epss 0.6%

Invalid pointer in the JavaScript Engine component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

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

Related CVEs — Mozilla Firefox

In the same product, most dangerous first.

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References

https://bugzilla.mozilla.org/show_bug.cgi?id=2013549 https://www.mozilla.org/security/advisories/mfsa2026-13/https://www.mozilla.org/security/advisories/mfsa2026-15/https://www.mozilla.org/security/advisories/mfsa2026-16/https://www.mozilla.org/security/advisories/mfsa2026-17/