Memory Safety Vulnerability in Firefox by Mozilla
CVE-2026-12290

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 16 June 2026

What is CVE-2026-12290?

A memory safety issue was identified in Firefox, which could allow malicious actors to execute arbitrary code. This vulnerability has been addressed in the latest updates for Firefox, and users are encouraged to upgrade to the patched versions—Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37—to mitigate potential risks. For additional information, users can refer to Mozilla's security advisories.

Affected Version(s)

Firefox 115.37

Firefox 140.12

Firefox 152

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2024852

https://www.mozilla.org/security/advisories/mfsa2026-57/

https://www.mozilla.org/security/advisories/mfsa2026-58/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Jun 16, 2026
Vulnerability Reserved
Jun 15, 2026

Credit

jayjayjazz

CVE-2026-12290 Data

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