{"id":"CVE-2026-74998","details":"In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS (Cascading Style Sheets) proxy were not validated, which may result in information disclosure or XSS (cross-site scripting) via MIME sniffing.","modified":"2026-11-01T17:28:00.429101027Z","published":"2026-08-17T12:40:29.903Z","related":["openSUSE-SU-2026:12169-1","openSUSE-SU-2026:22195-1"],"database_specific":{"cna_assigner":"mitre","cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74998.json"},"references":[{"type":"WEB","url":"https://github.com/roundcube/roundcubemail/releases/tag/1.6.18"},{"type":"WEB","url":"https://github.com/roundcube/roundcubemail/releases/tag/1.7.3"},{"type":"WEB","url":"https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74998.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74998"},{"type":"FIX","url":"https://github.com/roundcube/roundcubemail/commit/62d33c8a0dc3fd0dd03984220dc9709e8e0de43b"},{"type":"FIX","url":"https://github.com/roundcube/roundcubemail/commit/a2334990c02f7cb77b1a8d6fa97fcd9e1b5cd1fb"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/roundcube/roundcubemail","events":[{"introduced":"993b888afe29c383bf45c84f17090f4db96367ba"},{"fixed":"4a2bb87d9ea93578acb9bb03599abf754c33a33f"},{"introduced":"df9effa186f81d676962b941da4ebab5e05c3088"},{"fixed":"8473c30fd06f1aa4cfe4304ec54f54aef3b45abe"},{"fixed":"62d33c8a0dc3fd0dd03984220dc9709e8e0de43b"},{"fixed":"a2334990c02f7cb77b1a8d6fa97fcd9e1b5cd1fb"}],"database_specific":{"extracted_events":[{"source":"CPE_RANGE","cpe":"cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*","range":[{"introduced":"1.6.0"},{"fixed":"1.6.18"}]},{"cpe":"cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*","range":[{"introduced":"1.7.0"},{"fixed":"1.7.3"}],"source":"CPE_RANGE"},{"range":[{"fixed":"62d33c8a0dc3fd0dd03984220dc9709e8e0de43b"}],"source":"REFERENCES_COMMIT"},{"source":"REFERENCES_COMMIT","range":[{"fixed":"a2334990c02f7cb77b1a8d6fa97fcd9e1b5cd1fb"}]},{"range":[{"fixed":"4a2bb87d9ea93578acb9bb03599abf754c33a33f"}],"source":"REFERENCES_TAG","original_tag":"1.6.18"},{"range":[{"fixed":"8473c30fd06f1aa4cfe4304ec54f54aef3b45abe"}],"source":"REFERENCES_TAG","original_tag":"1.7.3"}]}}],"versions":["1.6.17","1.7.2","1.6.16","1.7.1","1.7.0","1.6.15","1.6.14","1.6.13","1.6.12","1.6.11","1.6.10","1.6.9","1.6.8","1.6.7","1.6.6","1.6.5","1.6.4","1.6.3","1.6.2","1.6.1","1.6.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74998.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"}]}