VulnerabilityPublished 10 Nov 2026

CVE-2026-124935: Undefined Behavior

Source GCVE Database

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Authoritative record:CVE-2026-124935· 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

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-64rc-32xh-g8g4

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. The vendor advisory confirms that the issue is fixed in these versions. No additional mitigation actions are indicated.

Description

CVE-2026-124935 is a vulnerability involving undefined behavior in the WebRTC Networking component of Firefox. This issue was addressed and fixed in Firefox version 160 and Firefox ESR 153.7. The vulnerability is rated with high impact by Mozilla, indicating significant security concerns if exploited.

Impact

The vulnerability is classified as high impact by Mozilla, implying that exploitation could lead to serious security consequences. However, no specific exploitation details or confirmed active exploits in the wild are reported. The undefined behavior in the networking component could potentially affect the security and stability of WebRTC communications within Firefox.

Summary

This vulnerability concerns undefined behavior in the WebRTC Networking component of Firefox. The flaw was resolved by Mozilla in Firefox 160 and Firefox ESR 153.7. The vendor advisory lists this issue among multiple high-impact security vulnerabilities fixed in the same release cycle. No further technical details about the nature of the undefined behavior or exploitation methods are provided in the advisory.

References

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