{"id":"CVE-2026-35539","published":"2026-04-03T03:39:17Z","modified":"2026-04-03T13:10:55Z","title":"An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14","vendor":"Roundcube","product":"Webmail","tier":"tail","description":{"text":"An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. XSS exists because of insufficient HTML attachment sanitization in preview mode. A victim must preview a text/html attachment.","provenance":"source","from":"CVE.org"},"cvss":{"score":6.1,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00251,"percentile":0.16497,"provenance":"source"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"references":[{"url":"https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14","tags":[]},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5","tags":[]},{"url":"https://github.com/roundcube/roundcubemail/commit/1b30edf5369668c92fe91dae3d52e477c808aa4f","tags":[]},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.6.14","tags":[]},{"url":"https://github.com/roundcube/roundcubemail/commit/10a6d1fa8acac85c727b0a6ae4a6642bfa27bea1","tags":[]},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.5.14","tags":[]},{"url":"https://github.com/roundcube/roundcubemail/commit/d742954ccbcdee7020f8f2e7c49ce0fca5a0efab","tags":[]}],"priority":{"score":7.6,"factors":[{"name":"EPSS percentile","points":3.3},{"name":"CVSS severity","points":4.27}]},"vendorSlug":"roundcube","affectedVersions":[{"vendor":"Roundcube","product":"Webmail","versions":["< 1.5.14",">= 1.6.0, < 1.6.14"]}],"affected":[{"ecosystem":"Packagist","package":"roundcube/roundcubemail","vulnerableRanges":[">=1.7-beta, <1.7-rc5"],"patched":["1.7-rc5"],"from":["GHSA-x4q5-8j5g-hpjc"],"provenance":"source"}],"euvd":{"id":"EUVD-2026-18581","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-roundcube-webmail-cwe-79"}}