CVE-2026-48845

MEDIUM

Roundcube Webmail - Incorrect Resource Transfer Between Spheres

Title source: rule

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.

References (5)

Core 5

Core References

https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1

https://github.com/roundcube/roundcubemail/releases/tag/1.7.1

https://github.com/roundcube/roundcubemail/commit/d82b8c6cd06c378eca6d647ccd548f4ff1c68659

View Patch ZIP pw:eip

https://github.com/roundcube/roundcubemail/releases/tag/1.6.16

https://github.com/roundcube/roundcubemail/commit/7b52353653a67e6073b97d70eb94047132b78556

View Patch ZIP pw:eip

Scores

CVSS v3 6.5

EPSS 0.0028

EPSS Percentile 19.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

CWE

CWE-669

Status published

Products (2)

Roundcube/Webmail 1.6.14 - 1.6.16

Roundcube/Webmail 1.7.0 - 1.7.1

Published May 25, 2026

Tracked Since May 26, 2026