CVE-2026-111062

    Dashboard / Vulnerabilities / CVE-2026-111062

    CVE-2026-111062

    Published: 5 Nov 2026Last Modified: 7 Nov 2026

    Summary: A russh SSH server accepts a publickey authentication whose signature uses a different algorithm than the one named in the request

    Details: russh is a Rust SSH client and server library. From version 0.34.0-beta.1 until version 0.64.0, its SSH server does not require the signature algorithm in a public-key authentication signature to match the algorithm named in the authentication request. A client possessing an authorized RSA private key can announce  rsa-sha2-512  while supplying a valid  ssh-rsa  SHA-1 signature, bypassing restrictions or producing misleading audit records when applications rely on the requested algorithm. A valid private-key signature remains required, and russh clients are not affected. This issue is fixed in version 0.64.0.

    References: https://github.com/Eugeny/russh/releases/tag/v0.64.0, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111062.json, https://github.com/Eugeny/russh/security/advisories/GHSA-j7h2-66j4-ghjf, https://nvd.nist.gov/vuln/detail/CVE-2026-111062, https://github.com/Eugeny/russh/commit/a0ded76bdc352f8fbeaaeb175fb2a0c586fbc8f2, https://github.com/Eugeny/russh/pull/759

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -497314960942156301ab17221b1c681156239f39

    Affected versions

    v0.63.3
    v0.63.2
    v0.63.1
    v0.63.0
    v0.63.0-beta.1

    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
    CVE-2026-111062 | CVE-DB