Hi,

The following vulnerability was published for expat.

CVE-2026-117610[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-117610
https://www.cve.org/CVERecord?id=CVE-2026-117610
[1] https://github.com/libexpat/libexpat/pull/1444

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore