Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/libexpat/libexpat
- https://github.com/libexpat/libexpat/blob/a76b1174c1ea52abb639a4c69d52b630a8a106
- https://github.com/libexpat/libexpat/commit/7b0d50e4b1d16fafd55876260701e04279a7
- https://github.com/libexpat/libexpat/pull/1444
- https://www.vulncheck.com/advisories/libexpat-through-2.9.0-null-pointer-derefer
FAQ
What is CVE-2026-117610?
CVE-2026-117610 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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 cont...
How severe is CVE-2026-117610?
CVE-2026-117610 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-117610?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.