CVE-2026-0669 — HIGH (7.5) — White Hats Nepal

Vulnerability Description

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Wikimedia Foundation MediaWiki - CSS extension allows Path Traversal.This issue affects MediaWiki - CSS extension: 1.44, 1.43, 1.39.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Css Project	Css	-
Mediawiki	Mediawiki	1.39.0

Related Weaknesses (CWE)

CWE-22

References

https://gerrit.wikimedia.org/r/q/Ia15bf3f2e5a341868568492a736ac3dbf706c22ePatch
https://phabricator.wikimedia.org/T401526ExploitIssue Tracking

FAQ

What is CVE-2026-0669?

CVE-2026-0669 is a vulnerability with a CVSS score of 7.5 (HIGH). Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Wikimedia Foundation MediaWiki - CSS extension allows Path Traversal.This issue affects MediaWiki - CSS ...

How severe is CVE-2026-0669?

CVE-2026-0669 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-0669?

Check the references section above for vendor advisories and patch information. Affected products include: Css Project Css, Mediawiki Mediawiki.