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VulnerabilityPublished

CVE-2026-124927: Site Isolation Issue

Source GCVE Database

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Authoritative record:CVE-2026-124927· High

Not known to be exploited.

Data as of 10 Nov 2026, 17:33 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 in Firefox 160 and Firefox ESR 153.7. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation actions are indicated by the vendor advisory.

Description

CVE-2026-124927 is a site isolation vulnerability in the Graphics: WebRender component of Firefox. This issue was addressed and fixed in Firefox version 160 and Firefox ESR 153.7. The vulnerability is part of a set of high-impact security flaws resolved in the same Firefox release.

References

Community reviews

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