CVE-2026-48843
Roundcube Webmail CSS Injection Vulnerability
Description
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.
INFO
Published Date :
May 25, 2026, 7:11 p.m.
Last Modified :
May 25, 2026, 7:11 p.m.
Remotely Exploit :
Yes !
Source :
mitre
Affected Products
The following products are affected by CVE-2026-48843
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update Roundcube Webmail to version 1.7.1 or later.
- Update Roundcube Webmail to version 1.6.17 or later.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-48843 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-48843 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
May. 25, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Added CWE CWE-918 Added Reference https://github.com/roundcube/roundcubemail/commit/ab96c88bfd888866ec5e02190b19618db283923a Added Reference https://github.com/roundcube/roundcubemail/commit/cb3fc9041e91640ba9ba49ee7b2147c176ebf5a1 Added Reference https://github.com/roundcube/roundcubemail/releases/tag/1.6.16 Added Reference https://github.com/roundcube/roundcubemail/releases/tag/1.7.1 Added Reference https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1