PT-2026-29981 · Roundcube · Webmail

Published 2026-04-03 · Updated 2026-04-03 · CVE-2026-35542

Mitre

CVSS v3.1

5.3

Medium

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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 access-control bypass.

Fix

Weakness Enumeration

CWE-669

Related Identifiers

CVE-2026-35542

Affected Products

Webmail

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-35542 · Security Note
• https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 · Note
• https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 · Note
• https://github.com/roundcube/roundcubemail/commit/fd0e98178db5c73eaa93d005b561874923f9b0f0 · Note
• https://github.com/roundcube/roundcubemail/commit/e052328e3dc75f13adc2e314eaa4096ac21084ad · Note
• https://github.com/roundcube/roundcubemail/commit/fde14d01adc9f37893cd82b635883e516ed453f8 · Note
• https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 · Note
• https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 · Note