UBUNTU-CVE-2026-111062

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Source

https://ubuntu.com/security/CVE-2026-111062

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111062.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-111062

Upstream

CVE-2026-111062

Published

2026-11-06T00:00:00Z

Modified

2026-11-07T01:45:11Z

Severity

2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Ubuntu - medium

Summary

[none]

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

Affected packages

Ubuntu:26.10 / rust-russh

Package

Name: rust-russh
Purl: pkg:deb/ubuntu/rust-russh?arch=source&distro=stonking

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.57.1-2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "librust-russh-dev",
            "binary_version": "0.57.1-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111062.json"