{"id":"CVE-2026-35537","aliases":["GHSA-rxj3-rrwm-pj4r"],"url":"https://o3.security/vulnerability/CVE-2026-35537","summary":"Roundcube Webmail: Unsafe deserialization in the redis/memcache session handler","details":"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.","published":"2026-04-03T03:28:29.321Z","modified":"2026-09-17T11:45:19.482138288Z","cvss":{"score":3.7,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"roundcube/roundcubemail","fixedVersion":"1.7-rc5"}],"fix":{"url":"https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3","label":"roundcube/roundcubemail@618c542"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/04/11/6"},{"type":"WEB","url":"https://github.com/roundcube/roundcubemail/releases/tag/1.5.14"},{"type":"WEB","url":"https://github.com/roundcube/roundcubemail/releases/tag/1.6.14"},{"type":"WEB","url":"https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5"},{"type":"WEB","url":"https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35537.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35537"},{"type":"FIX","url":"https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3"},{"type":"FIX","url":"https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74"},{"type":"FIX","url":"https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-17T11:45:19.482138288Z"}}