What is CVE-2026-35545?

CVE-2026-35545 is a medium-severity vulnerability in Roundcube Webmail, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 5.3/10. Published 2026-04-03.

How severe is CVE-2026-35545?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Roundcube Webmail

CVE-2026-35545

An issue was discovered in Roundcube Webmail before 1.5.15 and 1.6.15. The remote image blocking feature can be bypassed via SVG content in an e-mail message. This may lead to information disclosure or access-control bypass. This involves the animate element with attributeName=fill/filter/stroke.

EPSS: 0.003 (25.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Roundcube Webmail — versions 0, 1.6.0

Weakness classification (CWE)

CWE-669 — Incorrect Resource Transfer Between Spheres

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-2026-35545?: CVE-2026-35545 is a medium-severity vulnerability in Roundcube Webmail, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 5.3/10. Published 2026-04-03.
How severe is CVE-2026-35545?: Medium severity. CVSS v3 base score is 5.3 out of 10.