What is CVE-2026-113470?

CVE-2026-113470 is a medium-severity vulnerability, classified under Improper Certificate Validation. CVSS score: 5.4/10. Published 2026-10-20.

How severe is CVE-2026-113470?

Medium severity. CVSS v3 base score is 5.4 out of 10.

CVE-2026-113470

CVE-2026-113470

Mozilla blocked compromised intermediate eMudhra certificates via OneCRL on the 17th of October which was distributed to clients via RemoteSettings the same day. This update contains the updated OneCRL block list, ensuring clients will block the compromised certificates even if RemoteSettings is disabled by policy or otherwise unavailable in the user's network environment. This vulnerability was fixed in Firefox 158.0.1, Firefox ESR 153.5.1, and Firefox ESR 115.43.1.

Vulnerability class: Improper Certificate Validation

Published 2026-10-20 · last modified 2026-10-20.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

Frequently asked questions

What is CVE-2026-113470?: CVE-2026-113470 is a medium-severity vulnerability, classified under Improper Certificate Validation. CVSS score: 5.4/10. Published 2026-10-20.
How severe is CVE-2026-113470?: Medium severity. CVSS v3 base score is 5.4 out of 10.