USN-8577-1

Vladimir Tokarev discovered that OpenSSH incorrectly handled certificates with the principal name containing a comma character when using user-trusted CA keys in authorizedkeys and an authorizedkeys principals="" option that lists more than one principal. This could result in inappropriate principal matching, contrary to expectations. (CVE-2026-35414)

References

Affected packages

Ubuntu:Pro:16.04:LTS / openssh

Package

Name: openssh
Purl: pkg:deb/ubuntu/openssh?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1:7.2p2-4ubuntu2.10+esm9

Affected versions

1:6.*

1:6.9p1-2

1:6.9p1-3

1:7.*

1:7.1p1-1

1:7.1p1-3

1:7.1p1-4

1:7.1p1-6

1:7.1p2-1

1:7.1p2-2

1:7.2p1-1

1:7.2p2-1

1:7.2p2-2

1:7.2p2-3

1:7.2p2-4

1:7.2p2-4ubuntu1

1:7.2p2-4ubuntu2.1

1:7.2p2-4ubuntu2.2

1:7.2p2-4ubuntu2.4

1:7.2p2-4ubuntu2.5

1:7.2p2-4ubuntu2.6

1:7.2p2-4ubuntu2.7

1:7.2p2-4ubuntu2.8

1:7.2p2-4ubuntu2.10

1:7.2p2-4ubuntu2.10+esm1

1:7.2p2-4ubuntu2.10+esm2

1:7.2p2-4ubuntu2.10+esm3

1:7.2p2-4ubuntu2.10+esm4

1:7.2p2-4ubuntu2.10+esm5

1:7.2p2-4ubuntu2.10+esm6

1:7.2p2-4ubuntu2.10+esm7

1:7.2p2-4ubuntu2.10+esm8

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1:7.2p2-4ubuntu2.10+esm9",
            "binary_name": "openssh-client"
        },
        {
            "binary_version": "1:7.2p2-4ubuntu2.10+esm9",
            "binary_name": "openssh-client-ssh1"
        },
        {
            "binary_version": "1:7.2p2-4ubuntu2.10+esm9",
            "binary_name": "openssh-server"
        },
        {
            "binary_version": "1:7.2p2-4ubuntu2.10+esm9",
            "binary_name": "openssh-sftp-server"
        },
        {
            "binary_version": "1:7.2p2-4ubuntu2.10+esm9",
            "binary_name": "ssh"
        },
        {
            "binary_version": "1:7.2p2-4ubuntu2.10+esm9",
            "binary_name": "ssh-askpass-gnome"
        },
        {
            "binary_version": "1:7.2p2-4ubuntu2.10+esm9",
            "binary_name": "ssh-krb5"
        }
    ],
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:Pro:16.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-35414",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8577-1.json"