CVE-2026-56405 Details
Description
libexpat before 2.8.2 has an integer overflow in getAttributeId.
A signed integer overflow vulnerability has been identified in the libexpat XML parser library, affecting versions prior to 2.8.2. The issue arises in the getAttributeId function, where improper handling of integer values can lead to overflow conditions.
Users can upgrade to libexpat version 2.8.2 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 22, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/libexpat/libexpat/pull/1251 | [email protected] | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-190 | Integer Overflow or Wraparound | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| libexpat project libexpat | < 2.8.2 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 23, 2026 | Initial Analysis | [email protected] |
| Jun 22, 2026 | CVE Modified | CISA-ADP |
| Jun 21, 2026 | New CVE Received | [email protected] |