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Debian LTS Advisory DLA-4640-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Guilhem Moulin
June 22, 2026 https://wiki.debian.org/LTS
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Package : mediawiki
Version : 1:1.35.13-1+deb11u7 $bookworm_VERSION
CVE ID : CVE-2026-34087 CVE-2026-34088 CVE-2026-34093 CVE-2026-34095
Multiple security vulnerabilities were found in mediawiki, a website
engine for collaborative work, which could lead to information
disclosure or access controls bypass.
CVE-2026-34087
OATHAuth extension: Users API leaks whether privileged users have
their user groups disabled for lack of 2FA.
CVE-2026-34088
RecentChanges entries expose suppressed content via generated log
page HTML.
CVE-2026-34093
Special:UserRights page allows viewing user rights from private
wiki.
CVE-2026-34095
action=raw with Special:Mypage subpage title responds with
"Content-Type: text/html" on ctype=text/javascript request, which
may lead to cross-site scripting.
For Debian 11 bullseye, these problems have been fixed in version
1:1.35.13-1+deb11u7.
For Debian 12 bookworm, these problems have been fixed in version
$bookworm_VERSION.
We recommend that you upgrade your mediawiki packages.
For the detailed security status of mediawiki please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/mediawiki
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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