Eugeny russh up to 0.60.2 Compression allocation of resources

Summaryinfo

A vulnerability categorized as problematic has been discovered in Eugeny russh up to 0.60.2. Affected is an unknown function of the component Compression Handler. Executing a manipulation can lead to allocation of resources. This vulnerability is handled as CVE-2026-46673. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Eugeny russh up to 0.60.2 and classified as problematic. This vulnerability affects an unknown functionality of the component Compression Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

Russh is a Rust SSH client & server library. Prior to version 0.60.3, CryptoVec used unchecked capacity growth, unchecked length arithmetic, and unsafe allocation/locking paths. In current russh releases, local SSH agent peers could still feed attacker-controlled frame lengths into buffer growth before validation. In older russh releases before 0.58.0, remote SSH traffic also reached CryptoVec through transport and compression buffers. This issue has been patched in version 0.60.3.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-46673 since 05/15/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 0.60.3 eliminates this vulnerability.

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Productinfo

Vendor

• Eugeny

Name

• russh

Version

• 0.60.0
• 0.60.1
• 0.60.2

Website

• Product: https://github.com/Eugeny/russh/

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