VulnerabilityPublished 29 Oct 2026

CVE-2026-113470: firefox security update

Affects firefoxSource GCVE Database

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Authoritative record:CVE-2026-113470· Medium 5.4

Not known to be exploited · CVSS 5.4 Medium : upgrade to 153.5.1-1.oe2403sp4 when convenient.

Data as of 29 Oct 2026, 10:37 UTC

CVSS 3.1 base score

5.4Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 39% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 153.5.1-1.oe2403sp4

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: Low
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 20 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade firefox to 153.5.1-1.oe2403sp4.

Affected software

Product	Affected	Fixed in
openEuler 24.03-LTS-SP4firefox`pkg:rpm/openEuler/firefox&distro=openEuler-24.03-LTS-SP4`Other threats	Affected <153.5.1-1.oe2403sp4	Fixed in 153.5.1-1.oe2403sp4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A security update is available and should be applied. Users should upgrade to Firefox 158.0.1, Firefox ESR 153.5.1, or later versions as specified. Thunderbird users should also update to the fixed versions. Applying these official fixes mitigates the vulnerability.

Description

A cryptographic vulnerability was identified in Mozilla Firefox's Security Block-lists, Allow-lists, and other State component. This issue affects versions prior to Firefox 153.5.1-1.oe2403sp4 and was addressed in Firefox 158.0.1 and related ESR and Thunderbird versions. The vulnerability has a CVSS 3.1 base score of 5.4, indicating a medium severity level. No known exploits are reported in the wild.

Impact

The vulnerability impacts confidentiality and integrity of affected components but does not affect availability. It can be exploited remotely without privileges but requires user interaction. No active exploitation in the wild has been reported.

Summary

CVE-2026-113470 is a cryptographic issue affecting the Security Block-lists, Allow-lists, and other State components in Mozilla Firefox and Thunderbird. The flaw 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. The vulnerability allows an attacker to potentially impact confidentiality and integrity with no impact on availability. The CVSS vector indicates the attack requires network access, low complexity, no privileges, and user interaction.

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Affected software

Description

AI analysisMachine-generated, updated 29 Oct 2026, 10:36 UTC

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