CVE-2026-56411 Details
Description
xmlwf in libexpat before 2.8.2 has an integer overflow in endDoctypeDecl via NOTATION declarations.
A vulnerability has been identified in libexpat versions prior to 2.8.2, specifically within the xmlwf tool. The issue involves an integer overflow in the endDoctypeDecl function when processing NOTATION declarations. This overflow could potentially be exploited, leading to undefined behavior.
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/1263 | [email protected] | PatchIssue Tracking |
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] |