CVE-2026-58037

EUVD-2026-41042

01.07.2026, 16:16

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki.

This vulnerability is associated with program files includes/Language/Language.Php, includes/Logging/BlockLogFormatter.Php, includes/Logging/LogFormatter.Php, includes/Logging/PatrolLogFormatter.Php, includes/Logging/RenameuserLogFormatter.Php, includes/Logging/TagLogFormatter.Php, includes/Specials/SpecialVersion.Php.

This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

Cross-site Scripting

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	6.1 MEDIUM	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: 6.61%

Affected Products (NVD)

Vendor	Product	Version
mediawiki	mediawiki	1.43.0 ≤ 𝑥 < 1.43.9
mediawiki	mediawiki	1.44.0 ≤ 𝑥 < 1.44.6
mediawiki	mediawiki	1.45.0 ≤ 𝑥 < 1.45.4
mediawiki	mediawiki	1.46.0:rc0

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

mediawiki

bookworm	vulnerable
bookworm (security)	vulnerable
bullseye	vulnerable
bullseye (security)	vulnerable
forky	1:1.43.9+dfsg-1 fixed
sid	1:1.43.9+dfsg-1 fixed
trixie	1:1.43.9+dfsg-1~deb13u1 fixed
trixie (security)	1:1.43.9+dfsg-1~deb13u1 fixed

Ubuntu Releases

Ubuntu Product

Codename

mediawiki

bionic	needs-triage
focal	needs-triage
jammy	needs-triage
noble	needs-triage
questing	ignored
resolute	needs-triage

Common Weakness Enumeration

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References

https://phabricator.wikimedia.org/T422995