Labstack Echo up to 4.15.x/5.3.x Static path traversal

Summaryinfo

A vulnerability was found in Labstack Echo up to 4.15.x/5.3.x. It has been declared as problematic. Affected is an unknown function of the component Static Handler. The manipulation results in path traversal. This vulnerability is identified as CVE-2026-118650. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Labstack Echo up to 4.15.x/5.3.x. Affected is some unknown processing of the component Static 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. CVE summarizes:

Echo is a Go web framework. Prior to 4.16.0 and 5.4.0, a globally mounted middleware.Static instance can interpret an encoded request path differently from Echo's router because the router matches the still-encoded path while the static handler uses the decoded URL.Path. The advisory demonstrates an encoded slash resolving to a file under the static root through the global static middleware, but the source is internally inconsistent about whether a route or group guard protects the corresponding literal path in that global-mount configuration. This issue is fixed in 4.16.0 and 5.4.0.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-118650 since 10/28/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 4.16.0 or 5.4.0 eliminates this vulnerability.

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Productinfo

Vendor

• Labstack

Name

• Echo

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
• 4.13
• 4.14
• 4.15
• 5.0
• 5.1
• 5.2
• 5.3

Website

• Product: https://github.com/labstack/echo/

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