CVE-2026-118005: Mozilla Firefox · Use-after-free in the WebRTC: Signaling component
Affects Mozilla FirefoxSource CVE Database V5
Not known to be exploited.
Data as of 27 Oct 2026, 14:42 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 27 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
What to do
AI-suggested
Users should update to Firefox version 159 or later, where this vulnerability has been fixed. No additional mitigation steps are required once the update is applied.
Description
CVE-2026-118005 is a use-after-free vulnerability in the WebRTC signaling component of Mozilla Firefox. This flaw was addressed and fixed in Firefox version 159. The vulnerability is rated with high impact by Mozilla, indicating significant security concerns if exploited. No public exploit code or in-the-wild exploitation has been reported. Users are advised to update to Firefox 159 or later to mitigate this issue.