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CVE-2026-1466 is a medium severity cross-site scripting (XSS) vulnerability in the Jirafeau file sharing project. It arises from improper MIME type validation during browser preview of files, allowing attackers to bypass restrictions by sending manipulated HTTP requests with invalid MIME types. This causes browsers to MIME-sniff and potentially execute malicious JavaScript embedded in SVG or HTML files. The vulnerability does not require authentication but needs user interaction to trigger the preview. Although no known exploits are reported in the wild, the vulnerability can lead to limited confidentiality and integrity impacts due to script execution in the victim's browser. The issue can be mitigated by disabling MIME sniffing via the X-Content-Type-Options: nosniff header. European organizations using Jirafeau for file sharing should apply strict content-type validation and ensure security headers are properly configured to prevent exploitation. Join the discussion | CVE Database V5 | 01/28/2026, 06:33:15 UTC Added: 01/28/2026, 06:50:56 UTC |
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