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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (27.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000
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 (Vendor Advisory)
- github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 (Release Notes)
- github.com/roundcube/roundcubemail/commit/5fe8a69956a9683a4269f3ad2a68e18deebf8… (Patch)
- github.com/roundcube/roundcubemail/releases/tag/1.6.14 (Release Notes)
- github.com/roundcube/roundcubemail/commit/b18a8fa8e81571914c0ff55d4e20edb459c69… (Patch)
- github.com/roundcube/roundcubemail/releases/tag/1.5.14 (Release Notes)
- github.com/roundcube/roundcubemail/commit/7daf5aa9c190ccc75bb31672d8fee9938877f… (Patch)
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.