Summaryinfo

A vulnerability was found in salvo-rs salvo up to 0.89.2. It has been rated as critical. The affected element is the function encode_url_path. Performing a manipulation results in path traversal. This vulnerability is identified as CVE-2026-33242. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in salvo-rs salvo up to 0.89.2. This affects the function encode_url_path. 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. The summary by CVE is:

Salvo is a Rust web framework. Versions 0.39.0 through 0.89.2 have a Path Traversal and Access Control Bypass vulnerability in the salvo-proxy component. The vulnerability allows an unauthenticated external attacker to bypass proxy routing constraints and access unintended backend paths (e.g., protected endpoints or administrative dashboards). This issue stems from the encode_url_path function, which fails to normalize "../" sequences and inadvertently forwards them verbatim to the upstream server by not re-encoding the "." character. Version 0.89.3 contains a patch.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-33242 since 03/18/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 0.89.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 7bac30e6960355c58e358e402072d4a3e5c4e1bb 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 CNNVD (CNNVD-202603-4631). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• salvo-rs

Name

• salvo

Version

• 0.89.0
• 0.89.1
• 0.89.2

License

• open-source

Website

• Product: https://github.com/salvo-rs/salvo/

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