CVE-2026-16374: Vulnerability in Mozilla Firefox
Information disclosure in the Framework component in DevTools. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
AI Analysis
Technical Summary
CVE-2026-16374 is an information disclosure vulnerability affecting the Framework component in Firefox DevTools. The vulnerability was resolved by Mozilla in Firefox version 153 and Firefox ESR version 140.13. It is part of a broader set of security fixes released simultaneously addressing multiple high and moderate impact vulnerabilities. The vendor advisory confirms the fix and categorizes the impact of this specific vulnerability as moderate.
Potential Impact
The vulnerability allows information disclosure within the Framework component of Firefox DevTools, which could lead to unauthorized access to potentially sensitive data. The impact is rated moderate by the vendor. There are no reports of active exploitation in the wild.
Mitigation Recommendations
This vulnerability has been fixed by Mozilla in Firefox 153 and Firefox ESR 140.13. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation actions are required beyond applying the official update.
CVE-2026-16374: Vulnerability in Mozilla Firefox
Description
Information disclosure in the Framework component in DevTools. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
CVSS v3.1
Score 7.5high
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16374 is an information disclosure vulnerability affecting the Framework component in Firefox DevTools. The vulnerability was resolved by Mozilla in Firefox version 153 and Firefox ESR version 140.13. It is part of a broader set of security fixes released simultaneously addressing multiple high and moderate impact vulnerabilities. The vendor advisory confirms the fix and categorizes the impact of this specific vulnerability as moderate.
Potential Impact
The vulnerability allows information disclosure within the Framework component of Firefox DevTools, which could lead to unauthorized access to potentially sensitive data. The impact is rated moderate by the vendor. There are no reports of active exploitation in the wild.
Mitigation Recommendations
This vulnerability has been fixed by Mozilla in Firefox 153 and Firefox ESR 140.13. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation actions are required beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-gqm4-gr2q-ph9g
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-16374"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5fd1581010f89cc21c9b98
Added to database: 07/21/2026, 20:06:48 UTC
Last enriched: 07/22/2026, 17:40:13 UTC
Last updated: 08/28/2026, 17:30:33 UTC
Views: 50
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.