CVE-2026-48845
Deferred Deferred - Pending Action
Remote Image Blocking Bypass in Roundcube Webmail

Publication date: 2026-05-25

Last updated on: 2026-05-25

Assigner: MITRE

Description
In Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16 and 1.7.x before 1.7.1, remote image blocking was not honored for URLs pointing to local/private destinations, which may lead to information disclosure or privilege escalation via a text/html email message.
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Meta Information
Published
2026-05-25
Last Modified
2026-05-25
Generated
2026-06-15
AI Q&A
2026-05-26
EPSS Evaluated
2026-06-14
NVD
CVE-2026-48845
EUVD
EUVD-2026-31720
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
roundcube roundcube From 1.6.14 (inc) to 1.6.16 (inc)
roundcube roundcube to 1.7.1 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-669 The product does not properly transfer a resource/behavior to another sphere, or improperly imports a resource/behavior from another sphere, in a manner that provides unintended control over that resource.
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Executive Summary

This vulnerability affects Roundcube Webmail versions 1.6.x between 1.6.14 and 1.6.16, and 1.7.x before 1.7.1. It occurs because remote image blocking is not properly enforced for URLs that point to local or private network destinations. As a result, an attacker can send a text/html email message that bypasses this blocking, potentially leading to information disclosure or privilege escalation.

Impact Analysis

The vulnerability can lead to information disclosure, where sensitive data might be exposed to unauthorized parties. Additionally, it may allow privilege escalation, enabling an attacker to gain higher access rights than intended by exploiting the improper handling of remote image blocking in email messages.

Compliance Impact

This vulnerability in Roundcube Webmail may lead to information disclosure or privilege escalation via a text/html email message.

Such information disclosure could potentially impact compliance with data protection regulations like GDPR or HIPAA, which require safeguarding personal and sensitive information.

However, specific effects on compliance depend on the context of use and whether sensitive data is exposed due to this vulnerability.

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