Roundcube Webmail up to 1.6.15/1.7.0 SVG Document attributeName cross site scripting

Summaryinfo

A vulnerability classified as problematic has been found in Roundcube Webmail up to 1.6.15/1.7.0. Affected by this issue is some unknown functionality of the component SVG Document Handler. Performing a manipulation of the argument attributeName results in cross site scripting. This vulnerability was named CVE-2026-48848. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Roundcube Webmail up to 1.6.15/1.7.0. This affects some unknown processing of the component SVG Document Handler. The manipulation of the argument attributeName with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7 has insufficient HTML sanitization that could lead to Cascading Style Sheets (CSS) injection via an SVG document that has an animate element with the attributeName attribute.

The advisory is shared at roundcube.net. This vulnerability is uniquely identified as CVE-2026-48848 since 05/25/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 316867 (Linux Distros Unpatched Vulnerability : CVE-2026-48848), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.6.16 or 1.7.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (316867) and EUVD (EUVD-2026-31727). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Mail Client Software

Vendor

• Roundcube

Name

• Webmail

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5
• 1.6.6
• 1.6.7
• 1.6.8
• 1.6.9
• 1.6.10
• 1.6.11
• 1.6.12
• 1.6.13
• 1.6.14
• 1.6.15
• 1.7.0

License

• free

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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