Coturn up to 4.12.x CLI Command filename path traversal

Summaryinfo

A vulnerability described as very critical has been identified in Coturn up to 4.12.x. This vulnerability affects unknown code of the component CLI Command Handler. Executing a manipulation of the argument filename can lead to path traversal. This vulnerability appears as CVE-2026-53449. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as very critical was found in Coturn up to 4.12.x. This vulnerability affects an unknown code block of the component CLI Command Handler. The manipulation of the argument filename with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.0, the psd print sessions dump CLI command in coturn takes a filename argument and directly passes it to fopen with no path validation. An authenticated admin with CLI access can overwrite arbitrary files writable by the coturn process because the command string is used as-is after stripping the psd prefix and leading spaces, allowing truncation and overwrite with session dump data. This issue is fixed in version 4.13.0.

The advisory is available at github.com. This vulnerability was named CVE-2026-53449 since 06/09/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are necessary for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/10/2026). This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 4.13.0 eliminates this vulnerability.

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Productinfo

Name

• Coturn

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8
• 4.9
• 4.10
• 4.11
• 4.12

Website

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

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