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Active filters (1):Package: pkg:github/wikimedia/mediawiki-css-extension

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CVE-2026-0669 is a high-severity path traversal vulnerability in the CSS extension of Wikimedia Foundation's MediaWiki versions 1.39, 1.43, and 1.44. This flaw allows an unauthenticated remote attacker to read arbitrary files on the server by manipulating file path inputs, bypassing directory restrictions. The vulnerability impacts confidentiality but does not affect integrity or availability. No user interaction or privileges are required for exploitation, and no known exploits are currently reported in the wild. European organizations using affected MediaWiki versions, especially those hosting sensitive or proprietary information, face significant data exposure risks. Mitigation requires promptly updating to patched versions once available or applying strict input validation and access controls on the CSS extension. Countries with high MediaWiki adoption in government, education, and public sectors—such as Germany, France, the UK, and the Netherlands—are most at risk.

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