CVE-2026-100798 Firefox ESR - Cryptography Misuse

Firefox ESR contains a cryptography misuse vulnerability in the Storage: Quota Manager component, letting attackers potentially compromise data security, exploit requires unspecified conditions.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.20% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Cryptography Misuse
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Published
29 September 2026
Updated
15 October 2026
Weakness
CWE-325

Vendor fix

Update to Firefox ESR 153.4, 157 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs