Cryptographic Misuse in Firefox by Mozilla
CVE-2026-100798

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 29 September 2026

What is CVE-2026-100798?

A vulnerability in the Quota Manager component of Mozilla's Firefox and Firefox ESR products is caused by improper use of cryptographic functions. This flaw potentially exposes sensitive data and impacts data integrity, necessitating prompt updates to secure affected versions.

Affected Version(s)

Firefox 153.4

Firefox 157

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2055694

https://www.mozilla.org/security/advisories/mfsa2026-100/

https://www.mozilla.org/security/advisories/mfsa2026-97/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Sep 29, 2026
Vulnerability Reserved
Sep 26, 2026

Credit

Mozilla

CVE-2026-100798 Data

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