Nautobot: Authorization bypass in approval workflow REST API allows self-approval and unauthorized activation of scheduled jobs

{
  "id": "a5ff9f92b0f069d6be57fa5c70cdac34aa87159f5df51e26e2f41013e1181a4b",
  "url": "https://osv.dev/vulnerability/CVE-2026-83805",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Nautobot: Authorization bypass in approval workflow REST API allows self-approval and unauthorized activation of scheduled jobs",
    "summary": "Nautobot is a Network Source of Truth and Network Automation Platform. From 3.0.0 until 3.1.8, the generic ApprovalWorkflowStageResponse create endpoint does not enforce approver-group membership, change permission on the object under review, or the one-response-per-user restriction applied by the intended approve and deny actions. A user with only extras.add_approvalworkflowstageresponse can submit approved responses directly, while writable user and state fields permit responses to be attributed to arbitrary users. These forged responses can satisfy min_approvers, approve the workflow, and activate its gated ScheduledJob without a legitimate approver. This issue is fixed in version 3.1.8.",
    "evidence": "osv:CVE-2026-83805",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-83805",
      "aliases": [
        "CVE-2026-83805",
        "GHSA-q4c5-2j6f-r476",
        "PYSEC-2026-4111"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nautobot/nautobot",
              "type": "GIT",
              "events": [
                {
                  "introduced": "b9e675881bc7cc1ce7896637828972e691860c91"
                },
                {
                  "fixed": "106c8aaba19d92c83b55830f9b68a164e473ab5f"
                },
                {
                  "fixed": "8682707d0391cbfd7694e3276127b78dc9cf29d8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "3.0.0"
                      },
                      {
                        "fixed": "3.1.8"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "8682707d0391cbfd7694e3276127b78dc9cf29d8"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "106c8aaba19d92c83b55830f9b68a164e473ab5f"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v3.1.8"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.1.7",
            "v3.1.6",
            "v3.1.5",
            "v3.1.4",
            "v3.1.3",
            "v3.1.2",
            "v3.1.1",
            "v3.1.0",
            "v3.0.11",
            "v3.0.10",
            "v3.0.9",
            "v3.0.8",
            "v3.0.7",
            "v3.0.6",
            "v3.0.5",
            "v3.0.4",
            "v3.0.3",
            "v3.0.2",
            "v3.0.1",
            "v3.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-83805.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.600913185Z",
      "provider": "osv",
      "references": [
        "https://github.com/nautobot/nautobot/releases/tag/v3.1.8",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83805.json",
        "https://github.com/nautobot/nautobot/security/advisories/GHSA-q4c5-2j6f-r476",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-83805",
        "https://github.com/nautobot/nautobot/commit/8682707d0391cbfd7694e3276127b78dc9cf29d8"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-285",
          "CWE-639"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83805.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-83805",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497677,
  "published_at": "2026-09-22T19:47:42.826+00:00"
}