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paramiko — security advisory

Type: advisorySources: OSVAdvisory ID: UBUNTU-CVE-2026-44405

In Paramiko through 4.0.0 before a448945, rsakey.py allows the SHA-1 algorithm.

Products
paramiko
Affected versions
1.10.1-1, 1.10.1-1git1, 1.10.1-1git1build1, 1.10.1-1git1ubuntu0.1, 1.10.1-1git1ubuntu0.2, 1.15.2-1, 1.15.3-1, 1.15.3-1ubuntu1, 1.16.0-1, 1.16.0-1ubuntu0.1, 1.16.0-1ubuntu0.2, 1.16.0-1ubuntu0.2+esm2, 2.0.0-1, 2.0.0-1ubuntu1, 2.0.0-1ubuntu1.1, 2.0.0-1ubuntu1.2, 2.0.0-1ubuntu1.3, 2.12.0-2ubuntu1, 2.12.0-2ubuntu4, 2.12.0-2ubuntu4.1, 2.6.0-1, 2.6.0-2, 2.6.0-2ubuntu0.1, 2.6.0-2ubuntu0.3, 2.7.2-1ubuntu1, 2.8.0-1ubuntu1, 2.8.1-1ubuntu1, 2.8.1-1ubuntu2, 2.8.1-1ubuntu3, 2.9.3-0ubuntu1, 2.9.3-0ubuntu1.2, 2.9.3-0ubuntu1.3, 3.5.1-2ubuntu1, 3.5.1-3ubuntu1, 4.0.0-1ubuntu1, 4.0.0-1ubuntu2, 4.0.0-2ubuntu1
Fixed versions
Not specified
CVEs
CVE-2026-44405
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 03:04 UTC · Revision 1

Source evidence

UBUNTU-CVE-2026-44405

core-osv · Original source

Published 6 May 2026, 00:16 UTC

In Paramiko through 4.0.0 before a448945, rsakey.py allows the SHA-1 algorithm.

osv:UBUNTU-CVE-2026-44405

paramiko

Fixed versions: Not specified

paramiko

Fixed versions: Not specified

paramiko

Fixed versions: Not specified

paramiko

Fixed versions: Not specified

paramiko

Fixed versions: Not specified

paramiko

Fixed versions: Not specified

paramiko

Fixed versions: Not specified

paramiko

Fixed versions: Not specified

paramiko

Fixed versions: Not specified

Complete source record
{
  "id": "c3e756ca78a1c9e2079aace8b559c5bc76300fc1690b47865e494a02c15a1df2",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-44405",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-44405",
    "summary": "In Paramiko through 4.0.0 before a448945, rsakey.py allows the SHA-1 algorithm.",
    "evidence": "osv:UBUNTU-CVE-2026-44405",
    "products": [
      {
        "name": {
          "value": "paramiko",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.10.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.10.1-1git1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.10.1-1git1build1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.10.1-1git1ubuntu0.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.10.1-1git1ubuntu0.2",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "paramiko",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.15.2-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.15.3-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.15.3-1ubuntu1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.16.0-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.16.0-1ubuntu0.1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.16.0-1ubuntu0.2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.16.0-1ubuntu0.2+esm2",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "paramiko",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
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          {
            "value": "2.0.0-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.0.0-1ubuntu1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.0.0-1ubuntu1.1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.0.0-1ubuntu1.2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2.0.0-1ubuntu1.3",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "paramiko",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.6.0-1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "2.6.0-2",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "2.6.0-2ubuntu0.1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "2.6.0-2ubuntu0.3",
            "evidence": "/affected/3/versions"
          }
        ]
      },
      {
        "name": {
          "value": "paramiko",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.7.2-1ubuntu1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "2.8.0-1ubuntu1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "2.8.1-1ubuntu1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "2.8.1-1ubuntu2",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "2.8.1-1ubuntu3",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "2.9.3-0ubuntu1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "2.9.3-0ubuntu1.2",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "2.9.3-0ubuntu1.3",
            "evidence": "/affected/4/versions"
          }
        ]
      },
      {
        "name": {
          "value": "paramiko",
          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.12.0-2ubuntu1",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "2.12.0-2ubuntu4",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "2.12.0-2ubuntu4.1",
            "evidence": "/affected/5/versions"
          }
        ]
      },
      {
        "name": {
          "value": "paramiko",
          "evidence": "/affected/6/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.5.1-2ubuntu1",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "3.5.1-3ubuntu1",
            "evidence": "/affected/6/versions"
          }
        ]
      },
      {
        "name": {
          "value": "paramiko",
          "evidence": "/affected/7/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "4.0.0-1ubuntu2",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "4.0.0-2ubuntu1",
            "evidence": "/affected/7/versions"
          }
        ]
      },
      {
        "name": {
          "value": "paramiko",
          "evidence": "/affected/8/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.5.1-3ubuntu1",
            "evidence": "/affected/8/versions"
          },
          {
            "value": "4.0.0-1ubuntu1",
            "evidence": "/affected/8/versions"
          },
          {
            "value": "4.0.0-1ubuntu2",
            "evidence": "/affected/8/versions"
          }
        ]
      }
    ],
    "severity": "low",
    "structured": {
      "id": "UBUNTU-CVE-2026-44405",
      "aliases": [
        "UBUNTU-CVE-2026-44405"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N"
        },
        {
          "type": "Ubuntu",
          "score": "low"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "paramiko",
            "purl": "pkg:deb/ubuntu/paramiko?arch=source&distro=trusty",
            "ecosystem": "Ubuntu:14.04:LTS"
          },
          "versions": [
            "1.10.1-1",
            "1.10.1-1git1",
            "1.10.1-1git1build1",
            "1.10.1-1git1ubuntu0.1",
            "1.10.1-1git1ubuntu0.2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44405.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python-paramiko",
                "binary_version": "1.10.1-1git1ubuntu0.2"
              }
            ],
            "priority_reason": "This is a low severity issue"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "paramiko",
            "purl": "pkg:deb/ubuntu/paramiko?arch=source&distro=esm-infra%2Fxenial",
            "ecosystem": "Ubuntu:Pro:16.04:LTS"
          },
          "versions": [
            "1.15.2-1",
            "1.15.3-1",
            "1.15.3-1ubuntu1",
            "1.16.0-1",
            "1.16.0-1ubuntu0.1",
            "1.16.0-1ubuntu0.2",
            "1.16.0-1ubuntu0.2+esm2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44405.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python-paramiko",
                "binary_version": "1.16.0-1ubuntu0.2+esm2"
              },
              {
                "binary_name": "python3-paramiko",
                "binary_version": "1.16.0-1ubuntu0.2+esm2"
              }
            ],
            "priority_reason": "This is a low severity issue"
          }
        },
        {
          "ranges": [
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          ],
          "package": {
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            "purl": "pkg:deb/ubuntu/paramiko?arch=source&distro=bionic",
            "ecosystem": "Ubuntu:18.04:LTS"
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          "versions": [
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          },
          "ecosystem_specific": {
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              {
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                "binary_version": "2.0.0-1ubuntu1.3"
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          },
          "versions": [
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            "2.6.0-2",
            "2.6.0-2ubuntu0.1",
            "2.6.0-2ubuntu0.3"
          ],
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          },
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              {
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            "2.9.3-0ubuntu1",
            "2.9.3-0ubuntu1.2",
            "2.9.3-0ubuntu1.3"
          ],
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          },
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          },
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            "2.12.0-2ubuntu4.1"
          ],
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          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python3-paramiko",
                "binary_version": "2.12.0-2ubuntu4.1"
              }
            ],
            "priority_reason": "This is a low severity issue"
          }
        },
        {
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            {
              "type": "ECOSYSTEM",
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                {
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          ],
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            "name": "paramiko",
            "purl": "pkg:deb/ubuntu/paramiko?arch=source&distro=questing",
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          },
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            "3.5.1-2ubuntu1",
            "3.5.1-3ubuntu1"
          ],
          "database_specific": {
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          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python3-paramiko",
                "binary_version": "3.5.1-3ubuntu1"
              }
            ],
            "priority_reason": "This is a low severity issue"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
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                {
                  "introduced": "0"
                }
              ]
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          },
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            "4.0.0-1ubuntu2",
            "4.0.0-2ubuntu1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44405.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python3-paramiko",
                "binary_version": "4.0.0-2ubuntu1"
              }
            ],
            "priority_reason": "This is a low severity issue"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "paramiko",
            "purl": "pkg:deb/ubuntu/paramiko?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "3.5.1-3ubuntu1",
            "4.0.0-1ubuntu1",
            "4.0.0-1ubuntu2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44405.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python3-paramiko",
                "binary_version": "4.0.0-1ubuntu2"
              }
            ],
            "priority_reason": "This is a low severity issue"
          }
        }
      ],
      "modified": "2026-10-17T13:00:09.127445813Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-44405"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-44405",
        "https://www.cve.org/CVERecord?id=CVE-2026-44405"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-44405",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 360368,
  "published_at": "2026-05-06T00:16:00+00:00"
}