What is CVE-2026-48846?

CVE-2026-48846 is a medium-severity vulnerability in Roundcube Webmail, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 6.5/10. Published 2026-05-25.

How severe is CVE-2026-48846?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Roundcube Webmail

CVE-2026-48846

In Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1, the remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message, which may lead to information disclosure or access-control bypass.

EPSS: 0.000 (12.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Roundcube Webmail — versions 1.6.0, 1.7.0

Weakness classification (CWE)

CWE-669 — Incorrect Resource Transfer Between Spheres

References

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

Frequently asked questions

What is CVE-2026-48846?: CVE-2026-48846 is a medium-severity vulnerability in Roundcube Webmail, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 6.5/10. Published 2026-05-25.
How severe is CVE-2026-48846?: Medium severity. CVSS v3 base score is 6.5 out of 10.