Vulnerability-Lookup

GHSA-MJR9-FW4P-963X

Vulnerability from github – Published: 2026-09-03 21:31 – Updated: 2026-09-03 21:31

Details

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.

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.3 (Critical)


                  
                    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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-85391"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-798"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-03T19:17:30Z",
    "severity": "CRITICAL"
  },
  "details": "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.",
  "id": "GHSA-mjr9-fw4p-963x",
  "modified": "2026-09-03T21:31:15Z",
  "published": "2026-09-03T21:31:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85391"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Peppermint-Lab/peppermint/issues/528"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Peppermint-Lab/peppermint"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Peppermint-Lab/peppermint/blob/0.5.5/apps/api/src/lib/jwt.ts"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Peppermint-Lab/peppermint/blob/0.5.5/docker-compose.yml"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/peppermint-through-0.5.5-use-of-hard-coded-jwt-signing-secret-in-docker-compose-yml"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-85391 (GCVE-0-2026-85391)

Vulnerability from cvelistv5 – Published: 2026-09-03 18:54 – Updated: 2026-09-03 19:00

Title

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

Summary

Severity

9.3 (Critical)


                        
                          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

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-03 19:00 UTC

CWE

CWE-798 - Use of Hard-coded Credentials

Assigner

VulnCheck mitre root

References

5 references

URL	Tags
https://github.com/Peppermint-Lab/peppermint/issues/528	issue-tracking
https://github.com/Peppermint-Lab/peppermint	product
https://github.com/Peppermint-Lab/peppermint/blob…	technical-description
https://github.com/Peppermint-Lab/peppermint/blob…	technical-description
https://www.vulncheck.com/advisories/peppermint-t…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Peppermint-Lab	peppermint	Affected: 0 , ≤ 0.5.5 (custom) cpe:2.3:a:peppermint:peppermint::::::::

Date Public

2026-07-06 00:00

Credits

George Chen

Show details on NVD website

JSON

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        "metrics": [
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                "id": "CVE-2026-85391",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-03T19:00:41.202751Z",
                "version": "2.0.3"
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        "providerMetadata": {
          "dateUpdated": "2026-09-03T19:00:50.811Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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      }
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              "operator": "OR"
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      "metrics": [
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-MJR9-FW4P-963X

CVE-2026-85391 (GCVE-0-2026-85391)

Tags

Sightings

Nomenclature