CVE-2026-56131
Medium
Description
libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation. Thus, a use-after-free can occur (similar to the CVE-2026-50219 situation).
SeverityMedium
CVSS4.9
Exploit probability—
ProductLibexpat
PublishedJun 19, 2026
First seenJun 19, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- libexpat_project libexpat2.8.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| libexpat_project libexpat | v < 2.8.2 | 2.8.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.