4.9
Medium
CVE-2026-76957 libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| libexpat 2.8 | earliest → < 2.8.4 | 2.8.4 |
Other CVEs of libexpat
The 26 CVEs of libexpat →
CVE-2026-76956
In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy,…
5.9
Medium
CVE-2026-66046
Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the…
8.7
High
CVE-2026-72522
libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the…
6.2
Medium
CVE-2026-56412
libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth…
4.9
Medium