CVE-2026-35537

LOW

Roundcube Webmail <1.5.14 - Deserialization

Title source: llm

Description

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.

References (8)

https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14

https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5

https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74

https://github.com/roundcube/roundcubemail/releases/tag/1.6.14

https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620

https://github.com/roundcube/roundcubemail/releases/tag/1.5.14

https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3

View Patch ZIP pw:eip

[Mailing List] http://www.openwall.com/lists/oss-security/2026/04/11/6

Scores

CVSS v3 3.7

EPSS 0.0002

EPSS Percentile 4.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-502

Status published

Products (4)

roundcube/roundcubemail 1.7-beta - 1.7-rc5Packagist

Roundcube/Webmail < 1.5.14

roundcube/webmail < 1.5.14

Roundcube/Webmail 1.6.0 - 1.6.14

Published Apr 03, 2026

Tracked Since Apr 03, 2026