CVE-2026-78253: CWE-674 Uncontrolled Recursion in qt
Uncontrolled recursion in QXmlStreamReader::readElementText() in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted XML document.
AI Analysis
Technical Summary
The vulnerability CVE-2026-78253 in Qt arises from uncontrolled recursion in the QXmlStreamReader::readElementText() method. When processing a specially crafted XML document, this can lead to stack exhaustion, resulting in an application crash and denial of service. The issue affects Qt versions from 5.0.0 up to and including 6.8.8, and from 6.9.0 up to and including 6.11.1. The CVSS v4.0 base score is 2.3, indicating low severity. There is no vendor advisory or patch information provided, and no known exploitation in the wild has been reported.
Potential Impact
An attacker can cause a denial of service by triggering an application crash through stack exhaustion when the vulnerable function processes a malicious XML document. There is no indication of further impact such as code execution or data leakage.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider limiting exposure to untrusted XML inputs or applying application-level mitigations to detect and block malicious XML documents.
CVE-2026-78253: CWE-674 Uncontrolled Recursion in qt
Description
Uncontrolled recursion in QXmlStreamReader::readElementText() in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted XML document.
CVSS v4.0
Score 2.3low
Affected software
qt
qt
pkg:github/qt/qtbaseRun 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
The vulnerability CVE-2026-78253 in Qt arises from uncontrolled recursion in the QXmlStreamReader::readElementText() method. When processing a specially crafted XML document, this can lead to stack exhaustion, resulting in an application crash and denial of service. The issue affects Qt versions from 5.0.0 up to and including 6.8.8, and from 6.9.0 up to and including 6.11.1. The CVSS v4.0 base score is 2.3, indicating low severity. There is no vendor advisory or patch information provided, and no known exploitation in the wild has been reported.
Potential Impact
An attacker can cause a denial of service by triggering an application crash through stack exhaustion when the vulnerable function processes a malicious XML document. There is no indication of further impact such as code execution or data leakage.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider limiting exposure to untrusted XML inputs or applying application-level mitigations to detect and block malicious XML documents.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Qt
- Date Reserved
- 2026-08-24T07:14:59.859Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ab3bc94f7a7c54106b7b029
Added to database: 09/23/2026, 11:48:36 UTC
Last enriched: 09/23/2026, 12:03:04 UTC
Last updated: 09/24/2026, 01:57:04 UTC
Views: 15
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