CVE-2026-35537
LOW3.7EPSS 0.05%Roundcube Webmail: Unsafe deserialization in the redis/memcache session handler
Published: 4/3/2026Modified: 4/14/2026
Also known as:GHSA-rxj3-rrwm-pj4r
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.
Affected packages (2)
- Debian/roundcubefrom 0, < 1.6.5+dfsg-1+deb12u8
- Packagist/roundcube/roundcubemail>= 1.7-beta, < 1.7-rc5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
References (11)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-35537
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-35537
- PATCHhttps://github.com/roundcube/roundcubemail
- WEBhttps://github.com/roundcube/roundcubemail/commit/618c5428edc69fb088e7ac6c89e506dd39df3
- WEBhttps://github.com/roundcube/roundcubemail/commit/6d586cfa4d8a31f7957f7a445aaedd52592a0e74
- WEBhttps://github.com/roundcube/roundcubemail/commit/a4ead994d2f0ea92e4a1603196a197e0d5df1620
- WEBhttps://github.com/roundcube/roundcubemail/releases/tag/1.5.14
- WEBhttps://github.com/roundcube/roundcubemail/releases/tag/1.6.14
- WEBhttps://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
- WEBhttps://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14
- WEBhttp://www.openwall.com/lists/oss-security/2026/04/11/6