CVE-2026-100798
HIGHDescription
Cryptography misuse in Storage: Quota Manager component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 10% of all known CVEs.
References
Related Vulnerabilities
Other CWE-325 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2021-22946 | High | 7.5 | 4.5% | - | Fix |
| CVE-2020-15086 | Critical | 9.8 | 3.6% | - | Fix |
| CVE-2021-33560 | High | 7.5 | 2.3% | - | Fix |
| CVE-2020-15098 | High | 8.8 | 2.2% | - | Fix |
| CVE-2019-3738 | Medium | 6.5 | 1.7% | - | Fix |
| CVE-2016-9574 | Medium | 5.9 | 1.4% | - | Fix |
Common questions
How do I fix CVE-2026-100798?
Upgrade firefox on debian unstable to 157.0-1 or later.
Is CVE-2026-100798 being actively exploited?
Not that we know of. CVE-2026-100798 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.20% is the estimated probability that it will be exploited in the next 30 days. That is higher than 10% of all scored CVEs.
How severe is CVE-2026-100798?
CVE-2026-100798 has a CVSS v3 base score of 8.1, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-100798 affect?
Published advisories record a fix for firefox (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2026-100798
Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-01.