CVE-2026-25210
Medium
Description
In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation.
SeverityMedium
CVSS6.9
Exploit probability—
ProductLibexpat
PublishedJan 30, 2026
First seenJan 30, 2026
Weakness typeCWE-190Integer overflow
How to fix
Update
- libexpat_project libexpat2.7.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| libexpat_project libexpat | v < 2.7.4 | 2.7.4 |
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