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VulnerabilityPublished

CVE-2026-124934: Mozilla Firefox · Spoofing Issue in the Security Component

Affects Mozilla FirefoxSource CVE Database V5

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Not known to be exploited.

Data as of 10 Nov 2026, 13:47 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

Affected software

ProductAffectedFixed in
Mozilla FirefoxAffected
  • <160
Fixed in
  • 160

AI-suggested

Users and administrators should update Firefox to version 160 or later, or Firefox ESR 153.7 or later, to remediate this vulnerability. The fix is officially released and available. No additional mitigation steps are indicated by the vendor.

Description

CVE-2026-124934 is a spoofing vulnerability in the Security component of Mozilla Firefox. The issue was addressed and fixed in Firefox version 160 and Firefox ESR 153.7. No active exploitation in the wild has been reported. The vulnerability is part of a set of high-impact security fixes released by Mozilla.

References

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