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.
Published: 2026-04-03
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Information Disclosure
Action: Immediate Patch
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-6196-1 roundcube security update
Github GHSA Github GHSA GHSA-5hf6-crg4-fg59 Roundcube: Bypass of remote image blocking via crafted BODY background attribute
History

Wed, 08 Apr 2026 20:15:00 +0000

Type Values Removed Values Added
Title Roundcube Webmail Remote Image Blocking Feature Bypass Allows Information Disclosure

Tue, 07 Apr 2026 20:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*

Fri, 03 Apr 2026 14:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 03 Apr 2026 10:15:00 +0000

Type Values Removed Values Added
Title Roundcube Webmail Remote Image Blocking Feature Bypass Allows Information Disclosure
First Time appeared Roundcube
Roundcube webmail
Vendors & Products Roundcube
Roundcube webmail

Fri, 03 Apr 2026 05:15:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-669
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}


Subscriptions

Roundcube Webmail
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-04-03T12:51:27.986Z

Reserved: 2026-04-03T03:54:17.981Z

Link: CVE-2026-35542

cve-icon Vulnrichment

Updated: 2026-04-03T12:51:23.658Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-03T05:16:22.460

Modified: 2026-04-07T20:41:01.040

Link: CVE-2026-35542

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-08T19:54:21Z

Weaknesses