Hi,

The following vulnerability was published for expat.

CVE-2026-118370[0]:
| libexpat through 2.9.0 contains a signed integer overflow
| vulnerability in storeAtts() in lib/xmlparse.c that allows attackers
| to trigger out-of-bounds writes via oversized attribute counts.
| Attackers can supply a multi-gigabyte document with a start tag
| carrying over 2^30 attributes to overflow attIndex and nPrefixes,
| crashing applications or corrupting heap memory.


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-2026-118370
https://www.cve.org/CVERecord?id=CVE-2026-118370
[1] https://github.com/libexpat/libexpat/pull/1450

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore