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VulnerabilityPublished

CVE-2026-124905: Mozilla Firefox · Sandbox escape in the DOM: Navigation component

Affects Mozilla FirefoxSource CVE Database V5

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Not known to be exploited.

Data as of 10 Nov 2026, 13:50 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

A fix for this vulnerability is available and has been incorporated into Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7. Users and administrators should update to these versions or later to mitigate the risk. No additional mitigation actions are indicated by the vendor advisory.

Description

CVE-2026-124905 is a high-impact sandbox escape vulnerability in the DOM Navigation component of Mozilla Firefox. It allows an attacker to escape the browser's sandbox environment, potentially leading to unauthorized code execution or privilege escalation. This vulnerability was fixed in Firefox 160 and Firefox ESR versions 115.45 and 153.7.

References

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