CVE-2026-10702: Mozilla Firefox · Type Confusion
Affects Mozilla FirefoxSource CVE Database V5
Not known to be exploited · CVSS 4.3 Medium · patch available : update Mozilla Firefox when convenient.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.8% chance of exploitation in 30 days – higher than 58% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:LExploitation evidence
Disclosed: evidence found.
CVE published 2 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
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), GitHub proofs of concept, 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
Users should update Firefox to version 151.0.3 or later to remediate this vulnerability. Mozilla has officially fixed the issue in this release. No additional mitigations are required beyond applying the update.
Description
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 151.0.3.
References
- bugzilla.mozilla.org/show_bug.cgi?id=2040903 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2026-54/ (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-10702 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2484118 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-10702.json (opens in a new tab)