Use-after-free in the DOM: Streams component. (CVE-2026-92027)
CVE-2026-92027 is a use-after-free vulnerability in the DOM: Streams component of Firefox. This security flaw was addressed and fixed in Firefox 156 and Firefox ESR versions 115.41, 140.16, and 153.3. The vulnerability is considered high impact due to its potential to affect memory safety within the browser's DOM Streams implementation.
AI Analysis
Technical Summary
CVE-2026-92027 is a use-after-free vulnerability affecting the DOM Streams component in Firefox. Use-after-free vulnerabilities occur when a program continues to use memory after it has been freed, potentially leading to memory corruption or other security issues. Mozilla fixed this vulnerability in Firefox 156 and ESR versions 115.41, 140.16, and 153.3 as part of a broader security update addressing multiple memory safety issues. The vendor advisory classifies the impact as high.
Potential Impact
The vulnerability has a high impact rating according to Mozilla, indicating it could potentially allow attackers to exploit memory corruption issues within the DOM Streams component. However, no specific exploitation details or active exploits in the wild are reported in the advisory.
Mitigation Recommendations
A fix for this vulnerability is available and has been incorporated in Firefox 156 and Firefox ESR 115.41, 140.16, and 153.3. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are indicated by the vendor advisory.
Use-after-free in the DOM: Streams component. (CVE-2026-92027)
Description
CVE-2026-92027 is a use-after-free vulnerability in the DOM: Streams component of Firefox. This security flaw was addressed and fixed in Firefox 156 and Firefox ESR versions 115.41, 140.16, and 153.3. The vulnerability is considered high impact due to its potential to affect memory safety within the browser's DOM Streams implementation.
Affected software
pkg:github/mozilla/firefox-esrRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-92027 is a use-after-free vulnerability affecting the DOM Streams component in Firefox. Use-after-free vulnerabilities occur when a program continues to use memory after it has been freed, potentially leading to memory corruption or other security issues. Mozilla fixed this vulnerability in Firefox 156 and ESR versions 115.41, 140.16, and 153.3 as part of a broader security update addressing multiple memory safety issues. The vendor advisory classifies the impact as high.
Potential Impact
The vulnerability has a high impact rating according to Mozilla, indicating it could potentially allow attackers to exploit memory corruption issues within the DOM Streams component. However, no specific exploitation details or active exploits in the wild are reported in the advisory.
Mitigation Recommendations
A fix for this vulnerability is available and has been incorporated in Firefox 156 and Firefox ESR 115.41, 140.16, and 153.3. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-65cr-9wxj-vw4g
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-92027"]
- State
- PUBLISHED
Threat ID: 6aaa081255bf5e2cf5ea4a70
Added to database: 09/16/2026, 03:08:02 UTC
Last enriched: 09/16/2026, 05:08:00 UTC
Last updated: 09/16/2026, 05:08:00 UTC
Views: 4
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.