CVE-2026-0669— Path Traversal vulnerability in CSS extension on certain web servers
Quick assessment
Affected
Wikimedia Foundation MediaWiki - CSS extension
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
MediaWiki - CSS extension是MediaWiki开源的一个CSS扩展插件。 MediaWiki - CSS extension 1.44版本、1.43版本和1.39版本存在安全漏洞，该漏洞源于路径名限制不当，可能导致路径遍历。
Possible ATT&CK Techniques 1 AI
T1083 · File and Directory Discovery
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I. Basic Information for CVE-2026-0669
Vulnerability Information
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Vulnerability Title
Path Traversal vulnerability in CSS extension on certain web servers
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
MediaWiki - CSS extension 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MediaWiki - CSS extension是MediaWiki开源的一个CSS扩展插件。 MediaWiki - CSS extension 1.44版本、1.43版本和1.39版本存在安全漏洞，该漏洞源于路径名限制不当，可能导致路径遍历。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Wikimedia Foundation | MediaWiki - CSS extension | 1.44 | - |
|
II. Public POCs for CVE-2026-0669
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-0669 (2)
Same Patch Batch · Wikimedia Foundation · 2026-01-07 · 3 CVEs total
| CVE-2026-0670 | Stored XSS through a system message and a user-provided parameter in ProofreadPage | |
| CVE-2026-0668 | VisualData extension: Regular Expression Denial of Service (ReDoS) via crafted user input |
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V. Comments for CVE-2026-0669
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