{"id":"CVE-2026-75006","published":"2026-08-17T12:56:47Z","modified":"2026-08-17T14:06:46Z","title":"In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, insufficient Cascading Style Sheets (CSS) sanitization in…","vendor":"Roundcube","product":"Webmail","tier":"tail","description":{"text":"In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. This issue exists because of insufficient fixes for CVE-2026-35540, CVE-2026-48843 and CVE-2026-62643.","provenance":"source","from":"CVE.org"},"cvss":{"score":5.8,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00416,"percentile":0.35807,"provenance":"source"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"references":[{"url":"https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3","tags":[]},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.6.18","tags":[]},{"url":"https://github.com/roundcube/roundcubemail/commit/8a92380b06b5df1481e034c4f40d6a6546c21223","tags":[]},{"url":"https://github.com/roundcube/roundcubemail/commit/92f85c883594e5be757154f94548a9ba903455c9","tags":[]},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.7.3","tags":[]},{"url":"https://github.com/roundcube/roundcubemail/commit/7e10ca0110b7c9aa1b7850b843bb6625e47bbe00","tags":[]},{"url":"https://github.com/roundcube/roundcubemail/commit/c111b72950cd2bf57d6b86cd129568d90403322d","tags":[]}],"priority":{"score":11.2,"factors":[{"name":"EPSS percentile","points":7.16},{"name":"CVSS severity","points":4.06}]},"vendorSlug":"roundcube","affectedVersions":[{"vendor":"Roundcube","product":"Webmail","versions":[">= 1.6.0, < 1.6.18",">= 1.7.0, < 1.7.3"]}],"euvd":{"id":"EUVD-2026-60171","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-roundcube-webmail-cve-2026-35540","parents":[{"from":"CVE-2026-35540","to":"CVE-2026-75006","relation":"incomplete-fix","confidence":"high","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"incomplete-fix","quote":"This issue exists because of insufficient fixes for CVE-2026-35540, CVE-2026-48843 and CVE-2026-62643.","from":"CVE.org","in":"CVE-2026-75006"}]},{"from":"CVE-2026-48843","to":"CVE-2026-75006","relation":"incomplete-fix","confidence":"high","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"incomplete-fix","quote":"This issue exists because of insufficient fixes for CVE-2026-35540, CVE-2026-48843 and CVE-2026-62643.","from":"CVE.org","in":"CVE-2026-75006"},{"kind":"similar","provenance":"machine","score":0.93,"basis":"same product + CWE + description similarity"}]},{"from":"CVE-2026-62643","to":"CVE-2026-75006","relation":"incomplete-fix","confidence":"high","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"incomplete-fix","quote":"This issue exists because of insufficient fixes for CVE-2026-35540, CVE-2026-48843 and CVE-2026-62643.","from":"CVE.org","in":"CVE-2026-75006"},{"kind":"similar","provenance":"machine","score":0.99,"basis":"same product + CWE + description similarity"}]}]}}