Use-after-free in the Widget: Win32 component. (CVE-2026-92049)
CVE-2026-92049 is a use-after-free vulnerability in the Widget: Win32 component of Firefox. This security flaw was addressed and fixed in Firefox version 156 and Firefox ESR 153.3. The vulnerability is classified with high impact but no active exploits are currently known. Users of affected Firefox versions should upgrade to the fixed versions to mitigate the risk.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the Widget: Win32 component of 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 arbitrary code execution. Mozilla fixed this issue in Firefox 156 and Firefox ESR 153.3 as part of a security update addressing multiple high-impact vulnerabilities.
Potential Impact
The vulnerability has a high impact rating according to the vendor advisory, indicating it could allow for significant security issues such as memory corruption or privilege escalation if exploited. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
A fix for this vulnerability is available. Users should update to Firefox 156 or Firefox ESR 153.3 or later to remediate this issue. No additional mitigation actions are required beyond applying the official update.
Use-after-free in the Widget: Win32 component. (CVE-2026-92049)
Description
CVE-2026-92049 is a use-after-free vulnerability in the Widget: Win32 component of Firefox. This security flaw was addressed and fixed in Firefox version 156 and Firefox ESR 153.3. The vulnerability is classified with high impact but no active exploits are currently known. Users of affected Firefox versions should upgrade to the fixed versions to mitigate the risk.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in the Widget: Win32 component of 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 arbitrary code execution. Mozilla fixed this issue in Firefox 156 and Firefox ESR 153.3 as part of a security update addressing multiple high-impact vulnerabilities.
Potential Impact
The vulnerability has a high impact rating according to the vendor advisory, indicating it could allow for significant security issues such as memory corruption or privilege escalation if exploited. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
A fix for this vulnerability is available. Users should update to Firefox 156 or Firefox ESR 153.3 or later to remediate this issue. No additional mitigation actions are required beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-x58g-qm5p-75vj
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-92049"]
- State
- PUBLISHED
Threat ID: 6aaa080c55bf5e2cf5ea480d
Added to database: 09/16/2026, 03:07:56 UTC
Last enriched: 09/16/2026, 05:03:57 UTC
Last updated: 09/16/2026, 06:01:24 UTC
Views: 5
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