{"id":"CVE-2026-35544","state":"PUBLISHED","title":"An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to a fixed-position m","description":"An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to a fixed-position mitigation bypass via the use of !important.","publishedAt":"2026-04-03T03:59:49.053Z","updatedAt":"2026-04-03T12:50:12.338Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","source":"mitre"},"assigner":"mitre","products":["Roundcube Webmail"],"affected":[{"vendor":"Roundcube","product":"Webmail","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.5.14","versionType":"semver"},{"version":"1.6.0","status":"affected","lessThan":"1.6.14","versionType":"semver"}]}],"references":["https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14","https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5","https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0","https://github.com/roundcube/roundcubemail/releases/tag/1.6.14","https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662","https://github.com/roundcube/roundcubemail/releases/tag/1.5.14","https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7"],"weaknesses":["CWE-669"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/35xxx/CVE-2026-35544.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-35544","state":"PUBLISHED","datePublished":"2026-04-03T03:59:49.053Z","dateUpdated":"2026-04-03T12:50:12.338Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2026-04-03T03:59:48.463Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to a fixed-position mitigation bypass via the use of !important."}],"affected":[{"vendor":"Roundcube","product":"Webmail","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.5.14","versionType":"semver"},{"version":"1.6.0","status":"affected","lessThan":"1.6.14","versionType":"semver"}]}],"references":[{"url":"https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14"},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5"},{"url":"https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0"},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.6.14"},{"url":"https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662"},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.5.14"},{"url":"https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7"}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-669","description":"CWE-669 Incorrect Resource Transfer Between Spheres","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2026-04-03T03:59:49.053Z"},"x_generator":{"engine":"CVE-Request-form 0.0.1"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-03T12:50:06.228941Z","id":"CVE-2026-35544","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-03T12:50:12.338Z"}}]}}}