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    CVE-2026-42189

    Russh is a Rust SSH client & server library. Prior to version 0.60.1, a pre-authentication denial-of-service vulnerability exists in the server's keyboard-interactive authentication handler. A malicious client can crash any russh-based server that implements keyboard-interactive auth (e.g., for 2FA/TOTP) with a single malformed packet, requiring no credentials. This issue has been patched in version 0.60.1.

    Published:May 8, 2026
    Last Modified:May 14, 2026
    EPS:May 8, 2026
    EPSS Score:0.001
    CVSS Score:7.5

    Affected Products

    Vendor
    Eugeny
    Product
    Russh
    Vendor
    Russh Project
    Product
    Russh
    Vendor
    Warpgate Project
    Product
    Warpgate

    Exploits

    https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmghttps://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg

    Related CVEs

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    CVE-2026-73429 (CVSS 5.3) — Russh is a Rust SSH client & server library. Prior to 0.62.4, a malicious SSH server can crash a russh client …
    CVE-2026-68930 (CVSS 6.5) — Russh is a Rust SSH client & server library. Prior to 0.62.5, russh dispatches channel-scoped Handler callback…
    CVE-2026-48110 (CVSS 7.5) — Russh is a Rust SSH client & server library. From version 0.34.0 to before version 0.61.0, several russh clien…
    CVE-2026-48108 (CVSS 5.3) — Russh is a Rust SSH client & server library. From version 0.34.0-beta.1 to before version 0.61.0, russh did no…
    CVE-2026-48107 (CVSS 6.5) — Russh is a Rust SSH client & server library. From version 0.37.0 to before version 0.61.0, in the russh client…
    CVE-2026-46705 (CVSS 5.3) — Russh is a Rust SSH client & server library. From version 0.34.0-beta.1 to before version 0.61.0, the russh se…
    CVE-2026-46702 (CVSS 7.5) — Russh is a Rust SSH client & server library. From version 0.34.0 to before version 0.61.1, when SSH compressio…
    CVE-2026-46673 (CVSS 7.5) — Russh is a Rust SSH client & server library. Prior to version 0.60.3, CryptoVec used unchecked capacity growth…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High