CVE-2026-113470

MEDIUM

5.4

CVSS v3

Description

Cryptographic issue in the Security Block-lists, Allow-lists, and other State component. This vulnerability was fixed in Firefox 158.0.1, Firefox ESR 153.5.1, Firefox ESR 115.43.1, Thunderbird 158.0.1, Thunderbird 153.5.1, and Firefox 158.0.2.

CWE-295Improper Certificate Validation

How to fix

Remediation Available

firefoxDebian

Fixed in:158.0.1-1CVE-2026-113470

firefox-esrDebian

Fixed in:153.5.1esr-1~deb12u1CVE-2026-113470

Fixed in:153.5.1esr-1~deb13u1CVE-2026-113470

Fixed in:153.5.1esr-1CVE-2026-113470

thunderbirdDebian

Fixed in:1:153.5.1esr-1CVE-2026-113470

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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

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Exploit Intelligence

0.34%probability of exploitation in 30 days

26thpercentile

Low risk: more likely to be exploited than 26% of all known CVEs.

References

Other references9

Related Vulnerabilities

Other CWE-295 (Improper Certificate Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-4000	Low	3.7	100%	-	Fix
CVE-2020-0601	High	8.1	89%	KEV	Fix
CVE-2009-3555	Critical	9.8	87%	-	Fix
CVE-2022-26923	High	8.8	84%	KEV	Fix
CVE-2026-85102	Critical	9.8	54%	KEV	Fix
CVE-2023-27823	Critical	9.8	54%	-	-

Common questions

How do I fix CVE-2026-113470?

Published advisories record a fix for 3 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-113470 being actively exploited?

Not that we know of. CVE-2026-113470 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.34% is the estimated probability that it will be exploited in the next 30 days. That is higher than 26% of all scored CVEs.

How severe is CVE-2026-113470?

CVE-2026-113470 has a CVSS v3 base score of 5.4, rated medium. 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-2026-113470 affect?

Published advisories record a fix for firefox (Debian), firefox-esr (Debian), thunderbird (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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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 2026-10-21.