CVE-2026-56410: CWE-190 Integer Overflow or Wraparound in libexpat project libexpat
xmlwf in libexpat before 2.8.2 has an integer overflow in resolveSystemId.
AI Analysis
Technical Summary
CVE-2026-56410 is an integer overflow (CWE-190) vulnerability in the xmlwf component of the libexpat project prior to version 2.8.2. The issue occurs in the resolveSystemId function, where an integer overflow or wraparound can happen. This vulnerability may allow an attacker with local access and high attack complexity to cause a compromise affecting confidentiality, integrity, and availability, with the highest impacts on confidentiality and integrity.
Potential Impact
The vulnerability can lead to high confidentiality and integrity impacts, potentially allowing unauthorized disclosure or modification of data. Availability impact is low. Exploitation requires local access and has high complexity, with no privileges or user interaction required.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch link is provided, users should monitor libexpat project advisories for updates and consider upgrading to version 2.8.2 or later once available.
CVE-2026-56410: CWE-190 Integer Overflow or Wraparound in libexpat project libexpat
Description
xmlwf in libexpat before 2.8.2 has an integer overflow in resolveSystemId.
CVSS v3.1
Score 6.9medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-56410 is an integer overflow (CWE-190) vulnerability in the xmlwf component of the libexpat project prior to version 2.8.2. The issue occurs in the resolveSystemId function, where an integer overflow or wraparound can happen. This vulnerability may allow an attacker with local access and high attack complexity to cause a compromise affecting confidentiality, integrity, and availability, with the highest impacts on confidentiality and integrity.
Potential Impact
The vulnerability can lead to high confidentiality and integrity impacts, potentially allowing unauthorized disclosure or modification of data. Availability impact is low. Exploitation requires local access and has high complexity, with no privileges or user interaction required.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch link is provided, users should monitor libexpat project advisories for updates and consider upgrading to version 2.8.2 or later once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-21T15:54:59.828Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a380caeeed863c81e0981b6
Added to database: 06/21/2026, 16:09:18 UTC
Last enriched: 06/28/2026, 21:55:30 UTC
Last updated: 08/06/2026, 00:41:14 UTC
Views: 78
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