CVE-2026-35542
MEDIUM5.3EPSS 0.01%Roundcube: Bypass of remote image blocking via crafted BODY background attribute
Published: 4/3/2026Modified: 5/29/2026
Description
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.
Affected packages (2)
- Debian/roundcubefrom 0, < 1.4.15+dfsg.1-1+deb11u8
- Packagist/roundcube/roundcubemail>= 1.7-beta, < 1.7-rc5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
References (10)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-35542
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-35542
- PATCHhttps://github.com/roundcube/roundcubemail
- WEBhttps://github.com/roundcube/roundcubemail/commit/e052328e3dc75f13adc2e314eaa4096ac21084ad
- WEBhttps://github.com/roundcube/roundcubemail/commit/fd0e98178db5c73eaa93d005b561874923f9b0f0
- WEBhttps://github.com/roundcube/roundcubemail/commit/fde14d01adc9f37893cd82b635883e516ed453f8
- WEBhttps://github.com/roundcube/roundcubemail/releases/tag/1.5.14
- WEBhttps://github.com/roundcube/roundcubemail/releases/tag/1.6.14
- WEBhttps://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
- WEBhttps://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14