MEDIUM 6.3 NVD
CVE-2026-124317
libexpat through 2.10.0 contains an out-of-bounds read vulnerability in unknown_toUtf8() and unknown_toUtf16() in xmltok.c when handling application-registered
libexpat through 2.10.0 contains an out-of-bounds read vulnerability in unknown_toUtf8() and unknown_toUtf16() in xmltok.c when handling application-registered unknown encodings. Attackers can supply a document ending in a truncated multibyte sequence so the convert callback reads past the parse buffer, leaking adjacent memory or crashing applications.
References
- https://github.com/libexpat/libexpat
- https://github.com/libexpat/libexpat/blob/a70841d9ffa64ddde29ab824ed6305035ebe4c47/expat/l
- https://github.com/libexpat/libexpat/pull/1492
- https://www.vulncheck.com/advisories/libexpat-through-2.10.0-out-of-bounds-read-via-unknow
This medium severity vulnerability with a CVSS score of 6.3 was published on 2026-11-07 via NVD.
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