Vulnerability in Roundcube Webmail
CVE-2026-35542
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking feature can be bypassed via a crafted background attribute of a BODY element in an e-mail message. This may lead to information disclosure or…
EPSS: 0.000 (3.1th 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:L/I:N/A:N.
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
- github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
- github.com/roundcube/roundcubemail/commit/fd0e98178db5c73eaa93d005b561874923f9b…
- github.com/roundcube/roundcubemail/releases/tag/1.6.14
- github.com/roundcube/roundcubemail/commit/fde14d01adc9f37893cd82b635883e516ed45…
- github.com/roundcube/roundcubemail/releases/tag/1.5.14
- github.com/roundcube/roundcubemail/commit/e052328e3dc75f13adc2e314eaa4096ac2108…
Frequently asked questions
- What is CVE-2026-35542?
- CVE-2026-35542 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-2026-35542?
- Medium severity. CVSS v3 base score is 5.3 out of 10.