GHSA-v4h5-6r69-76p3HighCVSS 5.9
libexpat through 2.9.0 contains a NULL pointer dereference vulnerability in...
🔗 CVE IDs covered (1)
📋 Description
libexpat through 2.9.0 contains a NULL pointer dereference vulnerability in externalEntityInitProcessor2() in lib/xmlparse.c that mishandles the XML_TOK_NONE token from empty input. Attackers who control stream chunking can force an empty non-final first parse on an external entity subparser, causing a later parse to crash the application.
🔗 References (7)
- https://nvd.nist.gov/vuln/detail/CVE-2026-117610
- https://github.com/libexpat/libexpat/pull/1444
- https://github.com/libexpat/libexpat/commit/7b0d50e4b1d16fafd55876260701e04279a7489d
- https://github.com/libexpat/libexpat
- https://github.com/libexpat/libexpat/blob/a76b1174c1ea52abb639a4c69d52b630a8a106a2/expat/lib/xmlparse.c#L3468-L3510
- https://www.vulncheck.com/advisories/libexpat-through-2.9.0-null-pointer-dereference-via-external-entity-subparser
- https://github.com/advisories/GHSA-v4h5-6r69-76p3