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VulnerabilityPublished

CVE-2026-124938: Mozilla Firefox · Mitigation bypass in the Add-ons Manager component

Affects Mozilla FirefoxSource CVE Database V5

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Not known to be exploited.

Data as of 10 Nov 2026, 13:37 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 10 Nov 2026.

What to do

AI-suggested

Users and administrators should update Firefox to version 160 or later, or Firefox ESR 153.7 or later, to remediate this vulnerability. Applying the official fix provided by Mozilla fully mitigates the issue.

Description

CVE-2026-124938 is a mitigation bypass vulnerability in the Add-ons Manager component of Mozilla Firefox. This flaw was addressed and fixed in Firefox version 160 and Firefox ESR 153.7. The vulnerability could allow attackers to bypass security mitigations related to add-ons management.

References

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