CVE-2026-46702

The record

Russh is a Rust SSH client & server library. From version 0.34.0 to before version 0.61.1, when SSH compression is enabled, russh accepted compressed packets whose on-wire size passed the normal transport packet-length checks but whose decompressed size was much larger. This allowed a remote peer to send oversized post-decompression packets that should have been rejected. In current releases, this is a remote denial-of-service / resource-exhaustion issue in the post-decompression receive path. In older releases before 0.58.0, the same remote decompression path used CryptoVec, which appears to make the historical impact worse. This issue has been patched in version 0.61.1.

Affected packages

Related vulnerabilities

• GHSA-wwx6-x28x-8259 russh: Post-decompression SSH packet size was not bounded, allowing remote oversized… Same vulnerability
• GHSA-4r3c-5hpg-58qr Russh SSH message fields were decoded through allocation-first parsers before… Also affects russh
• GHSA-76r6-x97p-67vr Russh: SSH identification parsing accepted non-canonical client banners and did not bound… Also affects russh
• GHSA-g9g7-5cgw-6v28 Russh: Unchecked keyboard-interactive prompt count in client auth path Also affects russh
• CVE-2026-48108 Russh is a Rust SSH client & server library. Also affects russh
• CVE-2026-48110 Russh is a Rust SSH client & server library. Also affects russh
• CVE-2026-46705 Russh is a Rust SSH client & server library. Also affects russh
• CVE-2026-46673 Russh is a Rust SSH client & server library. Also affects russh