Rucio up to 35.8.2/38.5.3/39.3.0 cross site scripting

Summaryinfo

A vulnerability was found in Rucio up to 35.8.2/38.5.3/39.3.0. It has been classified as problematic. This affects an unknown function. This manipulation causes cross site scripting. This vulnerability is registered as CVE-2026-25736. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in Rucio up to 35.8.2/38.5.3/39.3.0. Affected by this vulnerability is an unknown code block. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is:

Rucio is a software framework that provides functionality to organize, manage, and access large volumes of scientific data using customizable policies. Versions prior to 35.8.3, 38.5.4, and 39.3.1 have a stored Cross-Site Scripting (XSS) vulnerability in the Custom RSE Attribute of the WebUI where attacker-controlled input is persisted by the backend and later rendered in the WebUI without proper output encoding. This allows arbitrary JavaScript execution in the context of the WebUI for users who view affected pages, potentially enabling session token theft or unauthorized actions. Versions 35.8.3, 38.5.4, and 39.3.1 fix the issue.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-25736 since 02/05/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation requires an enhanced level of successful authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 35.8.3, 38.5.4 or 39.3.1 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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

Productinfo

Name

• Rucio

Version

• 35.8.0
• 35.8.1
• 35.8.2
• 38.5.0
• 38.5.1
• 38.5.2
• 38.5.3
• 39.0
• 39.1
• 39.2
• 39.3.0

Website

• Product: https://github.com/rucio/rucio/

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

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