CVE-2026-35537
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 3.7epss 0.5%
exploitation probability
0.5%top 61% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected products
Roundcube · WebmailReferences
https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620https://github.com/roundcube/roundcubemail/releases/tag/1.5.14https://github.com/roundcube/roundcubemail/releases/tag/1.6.14https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14http://www.openwall.com/lists/oss-security/2026/04/11/6