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.

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: 0.003 (20.6th 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)

CWE-88 — Argument Injection

References

cve@mitre.org (Vendor Advisory)
cve@mitre.org (Release Notes)
cve@mitre.org (Patch)
cve@mitre.org (Release Notes)
cve@mitre.org (Patch)
cve@mitre.org (Release Notes)
cve@mitre.org (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.