CVE-2026-58036

Name	CVE-2026-58036
Description	Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Api/ApiQueryAllUsers.Php, includes/Api/ApiQueryUsers.Php, includes/Permissions/PermissionManager.Php, includes/User/UserGroupManager.Php.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
mediawiki (PTS)	bullseye	1:1.35.13-1+deb11u2	fixed
	bullseye (security)	1:1.35.13-1+deb11u7	fixed
	bookworm, bookworm (security)	1:1.39.17-1+deb12u2	fixed
	trixie	1:1.43.8+dfsg-1~deb13u1	fixed
	trixie (security)	1:1.43.9+dfsg-1~deb13u1	fixed
	forky, sid	1:1.43.9+dfsg-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
mediawiki	source	(unstable)	(not affected)

Notes

- mediawiki <not-affected> (Only affects 1.46 and later)
https://phabricator.wikimedia.org/T425406
https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1306035 (master)