{"id":"DEBIAN-CVE-2026-48822","details":"Shaarli is a personal bookmarking service. Versions 0.16.1 and prior contain a stored Cross-Site Scripting (XSS) vulnerability in the Markdown-to-HTML conversion process used in the Bookmark Description field. An authenticated user can inject a malicious javascript: URI inside a Markdown link. The vulnerability originates in the filterProtocols method within BookmarkMarkdownFormatter.php.This method attempts to sanitize Markdown links by filtering dangerous protocols (such as javascript:) before rendering. It uses the following regular expression: (#]\\((.*?)\\)#is). This regex is designed to detect inline Markdown links, but it fails to detect Markdown reference-style links because reference-style links are resolved by the Markdown parser after preprocessing. The filterProtocols method never inspects the actual URL used in these references and as a result, an attacker can supply a javascript: URI inside a reference definition. This issue has been fixed in version 0.16.2.","modified":"2026-09-14T17:03:16.173562508Z","published":"2026-06-17T20:17:23.060Z","upstream":["CVE-2026-48822"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-48822"}],"affected":[{"package":{"name":"shaarli","ecosystem":"Debian:12","purl":"pkg:deb/debian/shaarli?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.12.1+dfsg-8","0.12.1+dfsg-8+deb12u1","0.12.1+dfsg-8+deb12u2","0.13.0+dfsg-1","0.13.0+dfsg-2","0.13.0+dfsg-3","0.13.0+dfsg-4","0.13.0+dfsg-5","0.14.0+dfsg-1","0.14.0+dfsg-2","0.15.0+dfsg-1","0.16.1+dfsg-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48822.json"}},{"package":{"name":"shaarli","ecosystem":"Debian:13","purl":"pkg:deb/debian/shaarli?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.14.0+dfsg-1","0.14.0+dfsg-2","0.14.0+dfsg-2+deb13u1","0.15.0+dfsg-1","0.16.1+dfsg-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48822.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N"}]}