What is CVE-2026-25916?

CVE-2026-25916 is a medium-severity vulnerability in Roundcube Webmail, classified under Unprotected Alternate Channel. CVSS score: 4.3/10. Published 2026-02-09.

How severe is CVE-2026-25916?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Roundcube Webmail

CVE-2026-25916

Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13, when "Block remote images" is used, does not block SVG feImage.

EPSS: 0.006 (45.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

Affected products

Roundcube Webmail — versions 0, 1.6.0

Weakness classification (CWE)

CWE-420 — Unprotected Alternate Channel

References

cve@mitre.org
cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-25916?: CVE-2026-25916 is a medium-severity vulnerability in Roundcube Webmail, classified under Unprotected Alternate Channel. CVSS score: 4.3/10. Published 2026-02-09.
How severe is CVE-2026-25916?: Medium severity. CVSS v3 base score is 4.3 out of 10.