Roundcube Webmail: Unsafe deserialization in the redis/memcache session handler
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-35537US | high7.5 | — | ||
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 u… | ||||
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references
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2026/04/11/6WEB
- https://github.com/roundcube/roundcubemailPACKAGE
- https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3WEB
- https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74WEB
- https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620WEB
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.14WEB
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.14WEB
- https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5WEB
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