CVE-2026-95620: CWE-416 Use After Free in qt
Description
CVE-2026-95620 is a use-after-free vulnerability in the Qt QNetworkAccessManager HTTP/2 client support within the Qt Network module. This flaw allows a malicious or compromised HTTP/2 server to cause the client application to crash, impacting availability. The vulnerability affects Qt versions from 6.9.0 up to but not including 6.11.3. The CVSS 4.0 base score is 2.1, indicating a low severity level. There are no known exploits in the wild and no patch information is provided in the input data.
CVSS v4.0
Score 2.1low
Affected software
qt
qt
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a use-after-free condition (CWE-416) in the HTTP/2 client implementation of Qt's QNetworkAccessManager. A malicious or compromised HTTP/2 server can trigger this flaw, causing the client application to crash and thus affecting its availability. The affected versions are Qt >=6.9.0 and <6.11.3. The CVSS 4.0 vector indicates network attack vector, high attack complexity, partial user interaction, no privileges required, and low impact on confidentiality and integrity but high impact on availability.
Potential Impact
The primary impact is on availability, as exploitation causes the client application to crash. There is no indication of confidentiality or integrity compromise. No known exploits are reported in the wild, and the overall severity is low.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the input data. Users should monitor Qt vendor advisories for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Qt
- Date Reserved
- 2026-09-22T10:27:08.400Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6adb3e784d27ba8daafd9ea0
Added to database: 10/23/2026, 11:01:12 UTC
Last enriched: 10/23/2026, 11:15:17 UTC
Last updated: 10/23/2026, 11:16:08 UTC
Views: 5
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