Vulnerability in Roundcube Webmail
CVE-2026-35538
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsanitized IMAP SEARCH command arguments could lead to IMAP injection or CSRF bypass during mail search.
EPSS: 0.000 (3.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Roundcube Webmail — versions 0, 1.6.0
Weakness classification (CWE)
References
- roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14
- github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
- github.com/roundcube/roundcubemail/commit/5fe8a69956a9683a4269f3ad2a68e18deebf8…
- github.com/roundcube/roundcubemail/releases/tag/1.6.14
- github.com/roundcube/roundcubemail/commit/b18a8fa8e81571914c0ff55d4e20edb459c69…
- github.com/roundcube/roundcubemail/releases/tag/1.5.14
- github.com/roundcube/roundcubemail/commit/7daf5aa9c190ccc75bb31672d8fee9938877f…
Frequently asked questions
- What is CVE-2026-35538?
- CVE-2026-35538 is a low-severity vulnerability in Roundcube Webmail, classified under Argument Injection. CVSS score: 3.1/10. Published 2026-04-03.
- How severe is CVE-2026-35538?
- Low severity. CVSS v3 base score is 3.1 out of 10.