Arkon through 0.9.2 Missing Authorization via Skills Versions API

{
  "id": "8705aab738eef7385414f6bac7d06b4f9de508d8f64cca654309e5b6665fcadb",
  "url": "https://osv.dev/vulnerability/CVE-2026-111717",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Arkon through 0.9.2 Missing Authorization via Skills Versions API",
    "summary": "Arkon through 0.9.2 contains a missing authorization vulnerability in list_skill_versions that allows authenticated employees to read other departments' skill version metadata by bypassing the can_access_skill check. Attackers holding the default skill:read permission can request GET /api/skills/{slug}/versions for another department's skill to obtain version numbers, hashes, storage paths and changelogs.",
    "evidence": "osv:CVE-2026-111717",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-111717",
      "aliases": [
        "CVE-2026-111717"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nduckmink/arkon",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "ab21af9b199e637cd02442e6cd299c7b6e6b8ac7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.9.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.9.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.9.2",
            "v0.9.1",
            "v0.9.0",
            "v0.7.4",
            "v0.7.3",
            "v0.7.1",
            "v0.4.0",
            "v0.3.3",
            "v0.3.2",
            "v0.3.1",
            "v0.3.0",
            "v0.2.6",
            "v0.2.5",
            "v0.2.4",
            "v0.2.3",
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111717.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.052261938Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111717.json",
        "https://hackmd.io/@hieuPenguinnn/arkon-wiki-graph-cross-department-idor",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-111717",
        "https://www.vulncheck.com/advisories/arkon-through-0.9.2-missing-authorization-via-skills-versions-api",
        "https://github.com/nduckmink/arkon",
        "https://github.com/nduckmink/arkon/blob/v0.9.2/app/routers/skills.py#L408-L425",
        "https://github.com/nduckmink/arkon/blob/v0.9.2/app/routers/skills.py#L427-L434"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-639"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111717.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-111717",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 509720,
  "published_at": "2026-10-16T17:40:05.568+00:00"
}