{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.83.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2cb6148010a6c2a22900f4c8b08d75cc5c921d1c"
            },
            {
              "fixed": "afe852f60e39fcc6273d41e11f0765586b5a0e49"
            },
            {
              "fixed": "4b3c13f3ae3f0d4a92ed790f47a03ffbfb9d92cc"
            }
          ],
          "repo": "https://github.com/activepieces/activepieces",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9723-fmff-mc24"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-345",
      "CWE-639"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53536.json"
  },
  "details": "Activepieces is an open source AI workflow automation platform. Prior to 0.83.0, the /v1/step-files/signed download endpoint verified the supplied JWT against the shared signing secret but did not check the token's audience, and combined with a missing null-check on the decoded fileId, this allowed any caller holding any valid Activepieces JWT (including a freshly created user's own access token) to receive a step-file belonging to another tenant. The file returned was whatever PostgreSQL happened to scan first for type = FLOW_STEP_FILE, varying over time as the database changed, so an authenticated user could obtain step-file attachments belonging to other tenants on the same instance; the attacker could not target a specific victim or file, and the access was read-only with no integrity or availability impact. This issue is fixed in version 0.83.0.",
  "id": "CVE-2026-53536",
  "modified": "2026-07-19T03:30:51.707796587Z",
  "published": "2026-07-16T18:48:30.875Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/activepieces/activepieces/releases/tag/0.83.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53536.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/activepieces/activepieces/security/advisories/GHSA-9723-fmff-mc24"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53536"
    },
    {
      "type": "FIX",
      "url": "https://github.com/activepieces/activepieces/commit/2cb6148010a6c2a22900f4c8b08d75cc5c921d1c"
    },
    {
      "type": "FIX",
      "url": "https://github.com/activepieces/activepieces/commit/afe852f60e39fcc6273d41e11f0765586b5a0e49"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Activepieces: Cross-tenant file download via missing JWT audience check on step-files signed URL"
}