CVE-2026-92034: Mozilla Firefox · CWE-346
Affects Mozilla FirefoxSource CVE Database V5
Not known to be exploited · CVSS 9.1 Critical · fixed in 3.1 : patch Mozilla Firefox as a priority.
Data as of 30 Oct 2026, 20:25 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 19% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 15 Sep 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 30 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Mozilla Firefox | Affected
| Fixed in
|
AI-suggested
Mozilla has released an official fix for this vulnerability in Firefox 156. Users and administrators should update to Firefox 156 or later to remediate this issue. No additional mitigation steps are required once the update is applied.
Description
Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.