Peppermint through 0.5.5 Use of Hard-coded JWT Signing Secret in docker-compose.yml

{
  "id": "b860264238c4a05417852899f0a886098325536090040b76005ae1d4e10b76e9",
  "url": "https://osv.dev/vulnerability/CVE-2026-85391",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Peppermint through 0.5.5 Use of Hard-coded JWT Signing Secret in docker-compose.yml",
    "summary": "Peppermint through 0.5.5 contains a hardcoded JWT signing secret in docker-compose.yml that allows unauthenticated attackers to forge session tokens for any account. Attackers can use the published secret to mint valid tokens for arbitrary user IDs and access protected endpoints without credentials.",
    "evidence": "osv:CVE-2026-85391",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-85391",
      "aliases": [
        "CVE-2026-85391"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/peppermint-lab/peppermint",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "71ae71ba78e1d605bc4b178342710cc7f1dc3714"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.5.5"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.5.5"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.5.5",
            "0.5.4.2",
            "0.5.3.2",
            "0.5.3.1",
            "0.5.2",
            "0.5.1",
            "0.4.8",
            "0.4.7",
            "0.4.6",
            "0.4.2",
            "0.4",
            "0.3.5",
            "0.3.4",
            "0.3.3",
            "0.3.2",
            "0.3",
            "0.2.3",
            "0.2.2",
            "0.2.1",
            "0.2",
            "0.1.9",
            "0.1.8.5",
            "0.1.7.8",
            "0.1.7.7",
            "0.1.7.5",
            "0.1.6",
            "0.1.5",
            "0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85391.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.523403071Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85391.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-85391",
        "https://www.vulncheck.com/advisories/peppermint-through-0.5.5-use-of-hard-coded-jwt-signing-secret-in-docker-compose-yml",
        "https://github.com/Peppermint-Lab/peppermint/issues/528",
        "https://github.com/Peppermint-Lab/peppermint",
        "https://github.com/Peppermint-Lab/peppermint/blob/0.5.5/apps/api/src/lib/jwt.ts",
        "https://github.com/Peppermint-Lab/peppermint/blob/0.5.5/docker-compose.yml"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-798"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85391.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-85391",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 520343,
  "published_at": "2026-09-03T18:54:24.542+00:00"
}