CVE-2026-48843: SSRF

Q: What is the severity of CVE-2026-48843?

The severity of CVE-2026-48843 is high with a CVSS score of 7.2.

Q: How do I fix CVE-2026-48843?

To fix CVE-2026-48843, upgrade Roundcube Webmail to version 1.6.16 or 1.7.1 or later.

Q: What type of vulnerability is CVE-2026-48843?

CVE-2026-48843 is classified as an insufficient sanitization vulnerability that can lead to SSRF or information disclosure.

Q: What versions of Roundcube are affected by CVE-2026-48843?

Roundcube Webmail versions 1.6.x between 1.6.14 and 1.6.16, and 1.7.x before 1.7.1 are affected by CVE-2026-48843.

Q: What potential risks are associated with CVE-2026-48843?

The risks associated with CVE-2026-48843 include server-side request forgery (SSRF) and potential information disclosure if stylesheet links target local network hosts.

Published May 25, 2026

Updated

Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. The issue stems from an insufficient fix for CVE-2026-35540.

Affected Software

1 affected component

Roundcube Roundcube Webmail>=1.6.14<=1.6.16, >=1.7.0<1.7.1

Event History

May 25, 2026

CVE Published

via MITRE·07:11 PM

Data Sourced

via MITRE·07:11 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2026-48843?

The severity of CVE-2026-48843 is high with a CVSS score of 7.2.

How do I fix CVE-2026-48843?

To fix CVE-2026-48843, upgrade Roundcube Webmail to version 1.6.16 or 1.7.1 or later.

What type of vulnerability is CVE-2026-48843?

CVE-2026-48843 is classified as an insufficient sanitization vulnerability that can lead to SSRF or information disclosure.

What versions of Roundcube are affected by CVE-2026-48843?

Roundcube Webmail versions 1.6.x between 1.6.14 and 1.6.16, and 1.7.x before 1.7.1 are affected by CVE-2026-48843.

What potential risks are associated with CVE-2026-48843?

The risks associated with CVE-2026-48843 include server-side request forgery (SSRF) and potential information disclosure if stylesheet links target local network hosts.

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