{"id":"CVE-2026-35539","aliases":["DEBIAN-CVE-2026-35539","EUVD-2026-18581","GHSA-x4q5-8j5g-hpjc","UBUNTU-CVE-2026-35539"],"status":"published","title":"Roundcube Webmail: Insufficient HTML attachment sanitization in preview mode","description":"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. 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product":"webmail"},{"vendor":"roundcube","product":"webmail"}],"references":[{"url":"https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14","tags":["Vendor Advisory","web","report"]},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5","tags":["Release Notes","web","report"]},{"url":"https://github.com/roundcube/roundcubemail/commit/1b30edf5369668c92fe91dae3d52e477c808aa4f","tags":["Patch","fix","web","report"]},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.6.14","tags":["Release Notes","web","report"]},{"url":"https://github.com/roundcube/roundcubemail/commit/10a6d1fa8acac85c727b0a6ae4a6642bfa27bea1","tags":["Patch","fix","web","report"]},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.5.14","tags":["Release Notes","web","report"]},{"url":"https://github.com/roundcube/roundcubemail/commit/d742954ccbcdee7020f8f2e7c49ce0fca5a0efab","tags":["Patch","fix","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35539","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-x4q5-8j5g-hpjc"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35539.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-35539","tags":["advisory"]},{"url":"https://github.com/roundcube/roundcubemail","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2026-35539","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-35539","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-35539","description":"An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. 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A victim must preview a text/html attachment.","status":"published","published":"2026-04-03T03:39:17Z","modified":"2026-04-03T13:10:55Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T19:25:16.92155Z"}],"ghsa":[{"id":"GHSA-x4q5-8j5g-hpjc","title":"Roundcube Webmail: Insufficient HTML attachment sanitization in preview mode","description":"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.","status":"published","published":"2026-04-03T06:31:32Z","modified":"2026-04-04T06:50:58Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:39:47.945242Z"}],"nvd":[{"id":"CVE-2026-35539","description":"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.","status":"published","published":"2026-04-03T05:16:21.92Z","modified":"2026-07-24T21:10:00.143Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:12.73929Z"}],"osv":[{"id":"CVE-2026-35539","description":"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.","status":"published","published":"2026-04-03T03:39:17.4Z","modified":"2026-10-28T02:31:12.557410484Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:45:02.673625Z"},{"id":"DEBIAN-CVE-2026-35539","description":"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.","status":"published","published":"2026-04-03T05:16:21.92Z","modified":"2026-10-01T03:02:39.142941006Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:54.587575Z"},{"id":"GHSA-x4q5-8j5g-hpjc","title":"Roundcube Webmail: Insufficient HTML attachment sanitization in preview mode","description":"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. 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