VulnerabilityPublished 10 Nov 2026

CVE-2026-124902: Same-origin policy bypass due to race condition in the Audio/Video component

Source GCVE Database

Compare

Authoritative record:CVE-2026-124902· High

Not known to be exploited.

Data as of 10 Nov 2026, 17:52 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

Disclosed: evidence found.
CVE published 10 Nov 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 10 Nov 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.

ghsa-8q4g-hjg2-4whc

What to do

AI-suggested

Users and administrators should update Firefox to version 160 or later, or Firefox ESR to version 115.45 or later, where this vulnerability has been fixed. Applying these official patches fully mitigates the risk. No additional mitigation actions are indicated by the vendor advisory.

Description

CVE-2026-124902 is a vulnerability in Firefox's Audio/Video component that allows a same-origin policy bypass due to a race condition. This security flaw was addressed and fixed in Firefox 160 and Firefox ESR versions 115.45 and 153.7. The issue was reported by dodoh4t and is classified with high impact by Mozilla. No known exploits in the wild have been reported as of the advisory date.

References

Community reviews

Loading reviews…