What’s Vulnerable › Vulnerabilities

CVE-2026-48846

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-25 · updated 2026-07-24
• Weakness: CWE-669

Description

In Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1, the remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message, which may lead to information disclosure or access-control bypass.

Affected products

• Roundcube Webmail: from 1.6.0 before 1.6.16; from 1.7.0 before 1.7.1 — fixed in 1.6.16, 1.7.1

How to fix

Upgrade to a fixed version: Roundcube Webmail 1.6.16, 1.7.1. Check the vendor advisory for mitigations.

References

• https://github.com/roundcube/roundcubemail/commit/59cca80908a61e662c5f81741449e9aeb91e8abe
• https://github.com/roundcube/roundcubemail/commit/852350486b88b35b8544e8a630fad89e99e2150a
• https://github.com/roundcube/roundcubemail/releases/tag/1.6.16
• https://github.com/roundcube/roundcubemail/releases/tag/1.7.1
• https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1

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