CVE-2026-76957
Medium
Description
libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.
SeverityMedium
CVSS4.9
Exploit probability—
ProductLibexpat
PublishedAug 20, 2026
First seenAug 20, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- libexpat_project libexpat2.8.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| libexpat_project libexpat | v < 2.8.4 | 2.8.4 |
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