Vulnerability Details CVE-2026-35537
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 14.3%
CVSS Severity
CVSS v3 Score 3.7
References
- 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/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
Products affected by CVE-2026-35537
-
cpe:2.3:a:roundcube:webmail:*
-
cpe:2.3:a:roundcube:webmail:1.6.0
-
cpe:2.3:a:roundcube:webmail:1.6.1
-
cpe:2.3:a:roundcube:webmail:1.6.10
-
cpe:2.3:a:roundcube:webmail:1.6.11
-
cpe:2.3:a:roundcube:webmail:1.6.12
-
cpe:2.3:a:roundcube:webmail:1.6.2
-
cpe:2.3:a:roundcube:webmail:1.6.3
-
cpe:2.3:a:roundcube:webmail:1.6.4
-
cpe:2.3:a:roundcube:webmail:1.6.5
-
cpe:2.3:a:roundcube:webmail:1.6.6
-
cpe:2.3:a:roundcube:webmail:1.6.7
-
cpe:2.3:a:roundcube:webmail:1.6.8
-
cpe:2.3:a:roundcube:webmail:1.6.9