PT-2026-1965 · Unknown · Mediawiki - Css Extension

Radman Siddiki · Published 2026-01-07 · Updated 2026-02-23 · CVE-2026-0669

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions MediaWiki - CSS extension versions 1.39 through 1.44

Description An issue exists in the MediaWiki - CSS extension related to improper limitation of a pathname to a restricted directory, allowing for path traversal. This can potentially allow unauthorized access to files and directories on the system.

Recommendations MediaWiki - CSS extension version 1.39 is vulnerable and should be updated. MediaWiki - CSS extension version 1.40 is vulnerable and should be updated. MediaWiki - CSS extension version 1.41 is vulnerable and should be updated. MediaWiki - CSS extension version 1.42 is vulnerable and should be updated. MediaWiki - CSS extension version 1.43 is vulnerable and should be updated. MediaWiki - CSS extension version 1.44 is vulnerable and should be updated.

Exploit

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-0669

Affected Products

Mediawiki - Css Extension

References · 8

• 🔥 https://phabricator.wikimedia.org/T401526 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-0669 · Security Note
• https://osv.dev/vulnerability/CVE-2026-0669 · Vendor Advisory
• https://gerrit.wikimedia.org/r/q/Ia15bf3f2e5a341868568492a736ac3dbf706c22e · Patch
• https://twitter.com/redmin78/status/2014639911257944199 · Twitter Post
• https://t.me/CVEtracker/41616 · Telegram Post
• https://twitter.com/CVEnew/status/2009020538031886866 · Twitter Post
• https://t.me/cveNotify/152910 · Telegram Post