{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:sangoma:freepbx:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "17.0.8"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "36fa79d2dadbbe1ee632ea41f63fd78b8cfbca9f"
            }
          ],
          "repo": "https://github.com/freepbx/core",
          "type": "GIT"
        }
      ]
    },
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:sangoma:freepbx:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "17.0.8"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "33e05f03b9f5890686dce23bf9ee61af262b4ba8"
            }
          ],
          "repo": "https://github.com/freepbx/framework",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-vgjf-4h63-8vcc"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1390"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44237.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "17.0.8"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "FreePBX is an open source IP PBX. Prior to 17.0.8, the FreePBX api module's OAuth2 implementation does not sufficiently validate client credentials during token issuance. Knowledge of a valid client_id is required. The validateClient() method in ClientRepository.php unconditionally returns true, allowing any party with knowledge of a valid client_id to obtain OAuth2 access tokens without providing the correct client_secret. This vulnerability is fixed in 17.0.8.",
  "id": "CVE-2026-44237",
  "modified": "2026-07-08T05:35:58.160145693Z",
  "published": "2026-05-29T12:46:22.613Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44237.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/FreePBX/security-reporting/security/advisories/GHSA-vgjf-4h63-8vcc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44237"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "FreePBX: Authenticated Access can lead to Subsequent OAuth2 Authentication Bypass in API Module"
}