CVE-2026-56409
libexpat: Integer Overflow in xmlwf Output Filename
Description
xmlwf in libexpat before 2.8.2 has an integer overflow for the output filename when -d outputDir is used.
INFO
Published Date :
June 21, 2026, 3:52 p.m.
Last Modified :
June 21, 2026, 3:52 p.m.
Remotely Exploit :
No
Source :
mitre
Affected Products
The following products are affected by CVE-2026-56409
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update libexpat to version 2.8.2 or later.
- Apply necessary patches to resolve the integer overflow.
- Rebuild and redeploy affected applications.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-56409 vulnerability anywhere in the article.