CVE-2026-56405: CWE-190 Integer Overflow or Wraparound in libexpat project libexpat
libexpat before 2.8.2 has an integer overflow in getAttributeId.
AI Analysis
Technical Summary
CVE-2026-56405 is an integer overflow vulnerability (CWE-190) in the libexpat XML parsing library, specifically in the getAttributeId function. Versions prior to 2.8.2 are affected. The vulnerability could allow an attacker with local access and high attack complexity to cause a condition impacting confidentiality and integrity, with limited availability impact. No known exploits are reported in the wild, and no official fix or patch has been documented as of the publication date.
Potential Impact
The vulnerability can lead to a high impact on confidentiality and integrity of the affected system, with a low impact on availability. Exploitation requires local access and has high complexity, reducing the likelihood of widespread exploitation. No known exploits have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor libexpat project communications for an official fix. Until a patch is available, avoid using vulnerable versions in sensitive environments or apply additional controls to limit local access and reduce attack surface.
CVE-2026-56405: CWE-190 Integer Overflow or Wraparound in libexpat project libexpat
Description
libexpat before 2.8.2 has an integer overflow in getAttributeId.
CVSS v3.1
Score 6.9medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-56405 is an integer overflow vulnerability (CWE-190) in the libexpat XML parsing library, specifically in the getAttributeId function. Versions prior to 2.8.2 are affected. The vulnerability could allow an attacker with local access and high attack complexity to cause a condition impacting confidentiality and integrity, with limited availability impact. No known exploits are reported in the wild, and no official fix or patch has been documented as of the publication date.
Potential Impact
The vulnerability can lead to a high impact on confidentiality and integrity of the affected system, with a low impact on availability. Exploitation requires local access and has high complexity, reducing the likelihood of widespread exploitation. No known exploits have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor libexpat project communications for an official fix. Until a patch is available, avoid using vulnerable versions in sensitive environments or apply additional controls to limit local access and reduce attack surface.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-21T15:47:12.947Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a380caeeed863c81e0981a7
Added to database: 06/21/2026, 16:09:18 UTC
Last enriched: 06/28/2026, 21:55:04 UTC
Last updated: 08/04/2026, 12:46:13 UTC
Views: 58
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