YOURLS up to 1.10.4 Request yourls_get_request path traversal

Summaryinfo

A vulnerability categorized as critical has been discovered in YOURLS up to 1.10.4. This vulnerability affects the function yourls_get_request of the component Request Handler. The manipulation results in path traversal. This vulnerability is cataloged as CVE-2026-62858. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in YOURLS up to 1.10.4. Affected is the function yourls_get_request of the component Request Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

YOURLS is a self-hosted, customizable URL shortener written in PHP. Prior to 1.10.5, yourls_get_request() extracted the request path without sanitization, after which yourls_sanitize_url() and yourls_esc_url() preserved dot and slash traversal sequences before an attacker-controlled keyword reached file_exists() and include() under YOURLS_PAGEDIR. An unauthenticated remote attacker could traverse outside the intended pages directory and include a local PHP file that was already present on the server, such as an uploaded or injected file, causing the file to execute in the YOURLS web process. This issue is fixed in version 1.10.5.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-62858 since 07/14/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 1.10.5 eliminates this vulnerability.

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Productinfo

Name

• YOURLS

Version

• 1.10.0
• 1.10.1
• 1.10.2
• 1.10.3
• 1.10.4

Website

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

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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