GitHub Advisoryadvisory · Packagist
GHSA-5hf6-crg4-fg59 Roundcube: Bypass of remote image blocking via crafted BODY background attribute
MEDIUM
Official page ↗
- Aliases
- CVE-2026-35542
- Ecosystem
- Packagist
- Packages
- roundcube/roundcubemail
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-669
- Reviewed
- 2026-04-04
Affected packages
• Packagist roundcube/roundcubemail: >= 1.7-beta, < 1.7-rc5 → fixed in 1.7-rc5
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.
Related
Alias · CVE (1)
- CVE-2026-35542 An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. vulnerability
Weakness · CWE (1)
- CWE-669 Incorrect Resource Transfer Between Spheres weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-35542 advisory
- https://github.com/roundcube/roundcubemail/commit/e052328e3dc75f13adc2e314eaa4096ac21084ad web
- https://github.com/roundcube/roundcubemail/commit/fd0e98178db5c73eaa93d005b561874923f9b0f0 web
- https://github.com/roundcube/roundcubemail/commit/fde14d01adc9f37893cd82b635883e516ed453f8 web
- https://github.com/roundcube/roundcubemail package
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 web
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 web
- https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 web
- https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 web