Traefik up to 2.11.27/3.4.4/3.5.0-rc1 ZIP Archive path traversal

Summaryinfo

A vulnerability identified as critical has been detected in Traefik up to 2.11.27/3.4.4/3.5.0-rc1. This affects an unknown function of the component ZIP Archive Handler. Performing a manipulation results in path traversal. This vulnerability is cataloged as CVE-2025-54386. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Traefik up to 2.11.27/3.4.4/3.5.0-rc1. It has been classified as problematic. This affects some unknown functionality of the component ZIP Archive 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. The summary by CVE is:

Traefik is an HTTP reverse proxy and load balancer. In versions 2.11.27 and below, 3.0.0 through 3.4.4 and 3.5.0-rc1, a path traversal vulnerability was discovered in WASM Traefik’s plugin installation mechanism. By supplying a maliciously crafted ZIP archive containing file paths with ../ sequences, an attacker can overwrite arbitrary files on the system outside of the intended plugin directory. This can lead to remote code execution (RCE), privilege escalation, persistence, or denial of service. This is fixed in versions 2.11.28, 3.4.5 and 3.5.0.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2025-54386 since 07/21/2025. The exploitability is told to be difficult. It is possible to initiate the attack remotely. Additional levels of successful authentication are needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 2.11.28, 3.4.5 or 3.5.0-rc2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 5ef853a0c53068f69a6c229a5815a0dc6e0a8800 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-23415). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• Traefik

Version

• 2.11.0
• 2.11.1
• 2.11.2
• 2.11.3
• 2.11.4
• 2.11.5
• 2.11.6
• 2.11.7
• 2.11.8
• 2.11.9
• 2.11.10
• 2.11.11
• 2.11.12
• 2.11.13
• 2.11.14
• 2.11.15
• 2.11.16
• 2.11.17
• 2.11.18
• 2.11.19
• 2.11.20
• 2.11.21
• 2.11.22
• 2.11.23
• 2.11.24
• 2.11.25
• 2.11.26
• 2.11.27
• 3.4.0
• 3.4.1
• 3.4.2
• 3.4.3
• 3.4.4
• 3.5.0-rc1

License

• open-source

Website

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

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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