PT-2026-29975 · Roundcube · Webmail

Published 2026-04-03 · Updated 2026-04-03 · CVE-2026-35537

NVD

CVSS v3.1

3.7

Low

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

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.

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-35537

Affected Products

Webmail

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-35537 · Security Note
• https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 · Note
• https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 · Note
• https://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74 · Note
• https://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3 · Note
• https://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620 · Note
• https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 · Note
• https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 · Note