{"id":"GHSA-rxj3-rrwm-pj4r","aliases":["CVE-2026-35537"],"title":"Roundcube Webmail: Unsafe deserialization in the redis/memcache session handler","titleSource":"OSV","descriptionSource":"OSV","declaredSeverity":"LOW","description":"An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache session handler may lead to arbitrary file write operations by unauthenticated attackers via crafted session data.","severity":"low","score":3.7,"published":"2026-04-03T06:31:32.000Z","modified":"2026-04-14T22:20:49.698Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"roundcube/roundcubemail","sources":[{"name":"OSV · GHSA-rxj3-rrwm-pj4r","url":"https://osv.dev/vulnerability/GHSA-rxj3-rrwm-pj4r"}],"ranges":[{"events":[{"introduced":"1.7-beta"},{"fixed":"1.7-rc5"}],"type":"ECOSYSTEM"}],"versions":["1.7-beta","1.7-beta2","1.7-rc","1.7-rc2","1.7-rc3","1.7-rc4"],"fixed":["1.7-rc5"]}],"sourceAffected":[],"references":["https://nvd.nist.gov/vuln/detail/CVE-2026-35537","https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3","https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74","https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620","https://github.com/roundcube/roundcubemail","https://github.com/roundcube/roundcubemail/releases/tag/1.5.14","https://github.com/roundcube/roundcubemail/releases/tag/1.6.14","https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5","https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14","http://www.openwall.com/lists/oss-security/2026/04/11/6"],"sources":[{"name":"OSV","id":"GHSA-rxj3-rrwm-pj4r","modified":"2026-04-14T22:20:49.698656Z","url":"https://osv.dev/vulnerability/GHSA-rxj3-rrwm-pj4r"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":3.7}],"products":[],"remediation":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T18:20:33.032Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}