CVE-2026-71203 (GCVE-0-2026-71203)

Vulnerability from cvelistv5 – Published: 2026-08-05 06:58 – Updated: 2026-08-05 06:58
VLAI
Title
changedetection.io: Missing Authentication on /api/v1/full-spec Discloses Full OpenAPI Schema
Summary
changedetection.io's REST API resources are protected by an @auth.check_token decorator validating the caller's x-api-key header, except the Spec resource registered at /api/v1/full-spec (changedetectionio/api/Spec.py), whose get() method carries neither @auth.check_token nor @validate_openapi_request. An unauthenticated client can retrieve the full merged OpenAPI schema (all endpoint paths, parameters, and registered processor plugins) even when API access control is enabled and every sibling /api/v1/* route correctly requires the key.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-306 - Missing Authentication for Critical Function
Assigner
References
Impacted products
Credits
Eldor Nabijonov
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "changedetection.io",
          "programFiles": [
            "changedetectionio/api/Spec.py"
          ],
          "vendor": "dgtlmoon",
          "versions": [
            {
              "status": "affected",
              "version": "0.55.7"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Eldor Nabijonov"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "changedetection.io\u0027s REST API resources are protected by an @auth.check_token decorator validating the caller\u0027s x-api-key header, except the Spec resource registered at /api/v1/full-spec (changedetectionio/api/Spec.py), whose get() method carries neither @auth.check_token nor @validate_openapi_request. An unauthenticated client can retrieve the full merged OpenAPI schema (all endpoint paths, parameters, and registered processor plugins) even when API access control is enabled and every sibling /api/v1/* route correctly requires the key."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "value": "MEDIUM"
            },
            "type": "CVSS_3.1_severity"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306 Missing Authentication for Critical Function",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T06:58:56.911Z",
        "orgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
        "shortName": "TuranSec"
      },
      "references": [
        {
          "url": "https://github.com/dgtlmoon/changedetection.io"
        }
      ],
      "title": "changedetection.io: Missing Authentication on /api/v1/full-spec Discloses Full OpenAPI Schema"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
    "assignerShortName": "TuranSec",
    "cveId": "CVE-2026-71203",
    "datePublished": "2026-08-05T06:58:56.911Z",
    "dateReserved": "2026-08-05T06:56:15.798Z",
    "dateUpdated": "2026-08-05T06:58:56.911Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}



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