salvo-rs salvo up to 0.89.2 form_data allocation of resources

Summaryinfo

A vulnerability, which was classified as problematic, was found in salvo-rs salvo up to 0.89.2. This impacts the function form_data. Such manipulation leads to allocation of resources. This vulnerability is uniquely identified as CVE-2026-33241. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in salvo-rs salvo up to 0.89.2. It has been rated as problematic. Affected by this issue is the function form_data. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. CVE summarizes:

Salvo is a Rust web framework. Prior to version 0.89.3, Salvo's form data parsing implementations (`form_data()` method and `Extractible` macro) do not enforce payload size limits before reading request bodies into memory. This allows attackers to cause Out-of-Memory (OOM) conditions by sending extremely large payloads, leading to service crashes and denial of service. Version 0.89.3 contains a patch.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-33241 since 03/18/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 0.89.3 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202603-4632). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• salvo-rs

Name

• salvo

Version

• 0.89.0
• 0.89.1
• 0.89.2

Website

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

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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