In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user data.
https://github.com/libexpat/libexpat/pull/1131
Source: Mitre, NVD
Published: 2026-01-23
Updated: 2026-01-23
Base Score: 1.2
Vector: CVSS2#AV:L/AC:H/Au:N/C:N/I:N/A:P
Severity: Low
Base Score: 2.9
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS: 0.00004