medium4.9
CVE-2026-76957
libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Libexpat Project | Libexpat | before 2.8.4 |