usn-8222-1
Vulnerability from osv_ubuntu
Published
2026-04-29 12:10
Modified
2026-06-30 15:55
Summary
openssh vulnerabilities
Details

Christos Papakonstantinou discovered that the OpenSSH scp tool incorrectly handled the legacy scp protocol (-O) option. This could result in certain files being installed setuid or setgid, contrary to expectations. (CVE-2026-35385)

Florian Kohnhäuser discovered that OpenSSH incorrectly handled shell metacharacters in usernames within a command line. When untrusted usernames and non-default configurations using % in ssh_config are being used, an attacker could possibly use this issue to execute arbitrary code. (CVE-2026-35386)

Christos Papakonstantinou discovered that OpenSSH incorrectly handled parsing the PubkeyAcceptedAlgorithms and HostbasedAcceptedAlgorithms options. This could result in unintended ECDSA algorithms being used, contrary to expectations. (CVE-2026-35387)

Michalis Vasileiadis discovered that OpenSSH incorrectly handled proxy-mode multiplexing sessions. This could result in no confirmation being asked, contrary to expectations. (CVE-2026-35388)

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

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-35385",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35386",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/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": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35387",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35388",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35414",
              "severity": [
                {
                  "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": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openssh-client",
            "binary_version": "1:8.9p1-3ubuntu0.15"
          },
          {
            "binary_name": "openssh-server",
            "binary_version": "1:8.9p1-3ubuntu0.15"
          },
          {
            "binary_name": "openssh-sftp-server",
            "binary_version": "1:8.9p1-3ubuntu0.15"
          },
          {
            "binary_name": "openssh-tests",
            "binary_version": "1:8.9p1-3ubuntu0.15"
          },
          {
            "binary_name": "ssh",
            "binary_version": "1:8.9p1-3ubuntu0.15"
          },
          {
            "binary_name": "ssh-askpass-gnome",
            "binary_version": "1:8.9p1-3ubuntu0.15"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "openssh",
        "purl": "pkg:deb/ubuntu/openssh@1:8.9p1-3ubuntu0.15?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:8.9p1-3ubuntu0.15"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:8.4p1-6ubuntu2",
        "1:8.7p1-2",
        "1:8.7p1-2build1",
        "1:8.7p1-4",
        "1:8.8p1-1",
        "1:8.9p1-3",
        "1:8.9p1-3ubuntu0.1",
        "1:8.9p1-3ubuntu0.3",
        "1:8.9p1-3ubuntu0.4",
        "1:8.9p1-3ubuntu0.5",
        "1:8.9p1-3ubuntu0.6",
        "1:8.9p1-3ubuntu0.7",
        "1:8.9p1-3ubuntu0.10",
        "1:8.9p1-3ubuntu0.11",
        "1:8.9p1-3ubuntu0.13",
        "1:8.9p1-3ubuntu0.14"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-35385",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35386",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/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": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35387",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35388",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35414",
              "severity": [
                {
                  "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": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openssh-client",
            "binary_version": "1:9.6p1-3ubuntu13.16"
          },
          {
            "binary_name": "openssh-server",
            "binary_version": "1:9.6p1-3ubuntu13.16"
          },
          {
            "binary_name": "openssh-sftp-server",
            "binary_version": "1:9.6p1-3ubuntu13.16"
          },
          {
            "binary_name": "openssh-tests",
            "binary_version": "1:9.6p1-3ubuntu13.16"
          },
          {
            "binary_name": "ssh",
            "binary_version": "1:9.6p1-3ubuntu13.16"
          },
          {
            "binary_name": "ssh-askpass-gnome",
            "binary_version": "1:9.6p1-3ubuntu13.16"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "openssh",
        "purl": "pkg:deb/ubuntu/openssh@1:9.6p1-3ubuntu13.16?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.6p1-3ubuntu13.16"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.3p1-1ubuntu3",
        "1:9.4p1-1ubuntu1",
        "1:9.6p1-3ubuntu1",
        "1:9.6p1-3ubuntu2",
        "1:9.6p1-3ubuntu11",
        "1:9.6p1-3ubuntu12",
        "1:9.6p1-3ubuntu13",
        "1:9.6p1-3ubuntu13.3",
        "1:9.6p1-3ubuntu13.4",
        "1:9.6p1-3ubuntu13.5",
        "1:9.6p1-3ubuntu13.7",
        "1:9.6p1-3ubuntu13.8",
        "1:9.6p1-3ubuntu13.9",
        "1:9.6p1-3ubuntu13.11",
        "1:9.6p1-3ubuntu13.12",
        "1:9.6p1-3ubuntu13.13",
        "1:9.6p1-3ubuntu13.14",
        "1:9.6p1-3ubuntu13.15"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-35385",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35386",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/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": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35387",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35388",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35414",
              "severity": [
                {
                  "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": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openssh-client",
            "binary_version": "1:10.0p1-5ubuntu5.4"
          },
          {
            "binary_name": "openssh-client-gssapi",
            "binary_version": "1:10.0p1-5ubuntu5.4"
          },
          {
            "binary_name": "openssh-server",
            "binary_version": "1:10.0p1-5ubuntu5.4"
          },
          {
            "binary_name": "openssh-server-gssapi",
            "binary_version": "1:10.0p1-5ubuntu5.4"
          },
          {
            "binary_name": "openssh-sftp-server",
            "binary_version": "1:10.0p1-5ubuntu5.4"
          },
          {
            "binary_name": "openssh-tests",
            "binary_version": "1:10.0p1-5ubuntu5.4"
          },
          {
            "binary_name": "ssh",
            "binary_version": "1:10.0p1-5ubuntu5.4"
          },
          {
            "binary_name": "ssh-askpass-gnome",
            "binary_version": "1:10.0p1-5ubuntu5.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "openssh",
        "purl": "pkg:deb/ubuntu/openssh@1:10.0p1-5ubuntu5.4?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:10.0p1-5ubuntu5.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.9p1-3ubuntu3",
        "1:9.9p1-3ubuntu3.1",
        "1:10.0p1-5ubuntu2",
        "1:10.0p1-5ubuntu3",
        "1:10.0p1-5ubuntu4",
        "1:10.0p1-5ubuntu5",
        "1:10.0p1-5ubuntu5.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-35385",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35386",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/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": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35387",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35388",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-35414",
              "severity": [
                {
                  "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": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openssh-client",
            "binary_version": "1:10.2p1-2ubuntu3.2"
          },
          {
            "binary_name": "openssh-client-gssapi",
            "binary_version": "1:10.2p1-2ubuntu3.2"
          },
          {
            "binary_name": "openssh-server",
            "binary_version": "1:10.2p1-2ubuntu3.2"
          },
          {
            "binary_name": "openssh-server-gssapi",
            "binary_version": "1:10.2p1-2ubuntu3.2"
          },
          {
            "binary_name": "openssh-sftp-server",
            "binary_version": "1:10.2p1-2ubuntu3.2"
          },
          {
            "binary_name": "openssh-tests",
            "binary_version": "1:10.2p1-2ubuntu3.2"
          },
          {
            "binary_name": "ssh",
            "binary_version": "1:10.2p1-2ubuntu3.2"
          },
          {
            "binary_name": "ssh-askpass-gnome",
            "binary_version": "1:10.2p1-2ubuntu3.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "openssh",
        "purl": "pkg:deb/ubuntu/openssh@1:10.2p1-2ubuntu3.2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:10.2p1-2ubuntu3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:10.0p1-5ubuntu5",
        "1:10.2p1-2ubuntu1",
        "1:10.2p1-2ubuntu3"
      ]
    }
  ],
  "aliases": [],
  "details": "Christos Papakonstantinou discovered that the OpenSSH scp tool incorrectly\nhandled the legacy scp protocol (-O) option. This could result in certain\nfiles being installed setuid or setgid, contrary to expectations.\n(CVE-2026-35385)\n\nFlorian Kohnh\u00e4user discovered that OpenSSH incorrectly handled shell\nmetacharacters in usernames within a command line. When untrusted usernames\nand non-default configurations using % in ssh_config are being used, an\nattacker could possibly use this issue to execute arbitrary code.\n(CVE-2026-35386)\n\nChristos Papakonstantinou discovered that OpenSSH incorrectly handled\nparsing the PubkeyAcceptedAlgorithms and HostbasedAcceptedAlgorithms\noptions. This could result in unintended ECDSA algorithms being used,\ncontrary to expectations. (CVE-2026-35387)\n\nMichalis Vasileiadis discovered that OpenSSH incorrectly handled\nproxy-mode multiplexing sessions. This could result in no confirmation\nbeing asked, contrary to expectations. (CVE-2026-35388)\n\nVladimir Tokarev discovered that OpenSSH incorrectly handled certificates\nwith the principal name containing a comma character when using user-trusted\nCA keys in authorized_keys and an authorized_keys principals=\"\" option\nthat lists more than one principal. This could result in inappropriate\nprincipal matching, contrary to expectations. (CVE-2026-35414)",
  "id": "USN-8222-1",
  "modified": "2026-06-30T15:55:18Z",
  "published": "2026-04-29T12:10:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8222-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-35385"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-35386"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-35387"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-35388"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-35414"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "openssh vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-35385",
    "UBUNTU-CVE-2026-35386",
    "UBUNTU-CVE-2026-35387",
    "UBUNTU-CVE-2026-35388",
    "UBUNTU-CVE-2026-35414"
  ]
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.