CVE-2026-56132
Medium
Description
In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.
SeverityMedium
CVSS6.9
Exploit probability—
ProductLibexpat
PublishedJun 19, 2026
First seenJun 19, 2026
Weakness typeCWE-821CWE-821
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 |
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