Libraries Component Vulnerability in Mozilla Firefox
CVE-2026-6767

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 21 April 2026

What is CVE-2026-6767?

A vulnerability in the Libraries component of Mozilla Firefox and its ESR versions could potentially expose users to security risks. This issue has been addressed in Firefox version 150 and the extended support release versions 115.35 and 140.10, ensuring that user data remains protected and security is prioritized. Users are encouraged to update to the latest versions to mitigate the risk associated with this issue.

Affected Version(s)

Firefox 115.35

Firefox 140.10

Firefox 150

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2023209

https://www.mozilla.org/security/advisories/mfsa2026-30/

https://www.mozilla.org/security/advisories/mfsa2026-31/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Apr 21, 2026
Vulnerability Reserved
Apr 21, 2026

Credit

Haruto Kimura

CVE-2026-6767 Data

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