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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-05-25

Last Modified

2026-05-25

Generated

2026-07-06

AI Q&A

2026-05-26

EPSS Evaluated

2026-07-04

NVD

CVE-2026-48845

EUVD

EUVD-2026-31720

Affected Vendors & Products

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

KEV

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.

Attack-Flow Graph

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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