XRootD up to 5.9.1 XrdXrootdXeq.cc rpCheck input validation

Summaryinfo

A vulnerability was found in XRootD up to 5.9.1 and classified as problematic. This affects the function rpCheck of the file src/XrdXrootd/XrdXrootdXeq.cc. Such manipulation leads to input validation. This vulnerability is referenced as CVE-2026-125113. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in XRootD up to 5.9.1. It has been rated as problematic. Affected by this issue is the function rpCheck of the file src/XrdXrootd/XrdXrootdXeq.cc. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality. CVE summarizes:

The XRootD project provides a high-performance, fault-tolerant, and secure solution for handling large amounts of data distributed across multiple storage resources. Prior to version 5.9.2, XRootD's rpCheck() function in src/XrdXrootd/XrdXrootdXeq.cc rejects a parent-directory component only when two dots are followed by a slash and does not reject a terminal two-dot component. An unauthenticated attacker can append /.. to an exported path in xrdfs ls or an HTTP PROPFIND request, bypass the all.export directory scope, and cause directory and filename enumeration in the parent directory under oss.localroot. The demonstrated vector does not permit file download or disclose file contents. This issue is fixed in version 5.9.2.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-125113 since 11/09/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 5.9.2 eliminates this vulnerability.

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Productinfo

Name

• XRootD

Version

• 5.9.0
• 5.9.1

Website

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

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