CVE-2026-35537
CVSS Score
3.7
EPSS Score
0.0%
EPSS Percentile
12th
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.
| CWE | CWE-502 |
| Vendor | roundcube |
| Product | webmail |
| Published | Apr 3, 2026 |
| Last Updated | Apr 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
Roundcube / Webmail
0 < 1.5.14 1.6.0 < 1.6.14
References
roundcube.net: https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 github.com: https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 github.com: https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74 github.com: https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 github.com: https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620 github.com: https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 github.com: https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3 openwall.com: http://www.openwall.com/lists/oss-security/2026/04/11/6