CVE-2026-118006: Mozilla Firefox · Privilege escalation due to 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, 17:24 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
This vulnerability has been fixed in Firefox 159. Users and administrators should update to Firefox 159 or later to remediate this issue. No additional mitigation steps are required beyond applying the official update.
Description
CVE-2026-118006 is a privilege escalation vulnerability caused by a use-after-free flaw in the WebRTC signaling component of Mozilla Firefox. This security issue allows an attacker to potentially escalate privileges within the affected environment. The vulnerability was addressed and fixed in Firefox version 159.