Use-after-free in the DOM: HTML Parser component. (CVE-2026-92022)
CVE-2026-92022 is a use-after-free vulnerability in the DOM: HTML Parser 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 HTML parsing functionality.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the DOM's HTML Parser component within Firefox. Use-after-free vulnerabilities occur when a program continues to use a pointer after the memory it points to has been freed, potentially leading to memory corruption or other unintended behavior. Mozilla fixed this issue in Firefox 156 and corresponding ESR versions 115.41, 140.16, and 153.3. The vendor advisory classifies the impact as high but does not provide further technical exploitation details or CVSS metrics.
Potential Impact
The vulnerability has a high impact rating according to Mozilla, indicating it could potentially allow an attacker to cause memory corruption or other serious issues within the Firefox browser. However, no specific exploitation details or active exploits in the wild have been reported.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156 and Firefox ESR versions 115.41, 140.16, and 153.3. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation actions are indicated by the vendor advisory.
Use-after-free in the DOM: HTML Parser component. (CVE-2026-92022)
Description
CVE-2026-92022 is a use-after-free vulnerability in the DOM: HTML Parser 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 HTML parsing functionality.
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
This vulnerability involves a use-after-free condition in the DOM's HTML Parser component within Firefox. Use-after-free vulnerabilities occur when a program continues to use a pointer after the memory it points to has been freed, potentially leading to memory corruption or other unintended behavior. Mozilla fixed this issue in Firefox 156 and corresponding ESR versions 115.41, 140.16, and 153.3. The vendor advisory classifies the impact as high but does not provide further technical exploitation details or CVSS metrics.
Potential Impact
The vulnerability has a high impact rating according to Mozilla, indicating it could potentially allow an attacker to cause memory corruption or other serious issues within the Firefox browser. However, no specific exploitation details or active exploits in the wild have been reported.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156 and Firefox ESR versions 115.41, 140.16, and 153.3. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation actions are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-gcxv-gv82-5hp5
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-92022"]
- State
- PUBLISHED
Threat ID: 6aaa081155bf5e2cf5ea483d
Added to database: 09/16/2026, 03:08:01 UTC
Last enriched: 09/16/2026, 05:06:57 UTC
Last updated: 09/16/2026, 05:06:57 UTC
Views: 4
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