CVE-2026-100798

HIGH 8.1

Cryptography misuse in Storage: Quota Manager component

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

Cryptography misuse in Storage: Quota Manager component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.

Vendor	mozilla
Product	firefox
Ecosystems	Browser JavaScript
Industries	Technology
Published	Sep 29, 2026
Last Updated	Oct 1, 2026

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Affected Versions

Mozilla / Firefox

All versions affected

Mozilla / Thunderbird

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2055694 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-100/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-101/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-103/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-97/

Credits

Mozilla