Vulnerability-Lookup

GHSA-MHVH-GWHR-76PW

Vulnerability from github – Published: 2026-07-22 12:32 – Updated: 2026-07-22 17:59

Summary

Duplicate Advisory: Google Service Account Private Key Exposed in JWT Header

Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-9r8p-h6cc-6qhm. This link is maintained to preserve external references.

Original Description

n8n versions before 1.123.64, 2.29.8, and 2.30.1 contain a credential exposure vulnerability: when configured with a Google Service Account key, the full PEM private key was mistakenly placed in the JWT header's kid field (intended only for a key identifier). Because JWT headers are Base64-encoded rather than encrypted, the private key could be recovered by anything that logged or inspected the JWT. An attacker who obtained the key could impersonate the service account and access or modify any Google Cloud resource it was authorized to use. Only instances using Google Service Account credentials are affected.

Severity

5.1 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:L

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JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 1.123.64"
      },
      "package": {
        "ecosystem": "npm",
        "name": "n8n"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-312"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-22T17:59:48Z",
    "nvd_published_at": "2026-07-22T12:18:20Z",
    "severity": "MODERATE"
  },
  "details": "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of\u00a0GHSA-9r8p-h6cc-6qhm. This link is maintained to preserve external references.\n\n## Original Description\nn8n versions before 1.123.64, 2.29.8, and 2.30.1 contain a credential exposure vulnerability: when configured with a Google Service Account key, the full PEM private key was mistakenly placed in the JWT header\u0027s kid field (intended only for a key identifier). Because JWT headers are Base64-encoded rather than encrypted, the private key could be recovered by anything that logged or inspected the JWT. An attacker who obtained the key could impersonate the service account and access or modify any Google Cloud resource it was authorized to use. Only instances using Google Service Account credentials are affected.",
  "id": "GHSA-mhvh-gwhr-76pw",
  "modified": "2026-07-22T17:59:48Z",
  "published": "2026-07-22T12:32:18Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-9r8p-h6cc-6qhm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-65599"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/n8n-before-credential-exposure-via-jwt-header"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:L/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"
    }
  ],
  "summary": "Duplicate Advisory: Google Service Account Private Key Exposed in JWT Header",
  "withdrawn": "2026-07-22T17:59:48Z"
}

CVE-2026-65599 (GCVE-0-2026-65599)

Vulnerability from cvelistv5 – Published: 2026-07-22 11:21 – Updated: 2026-07-22 18:24

Title

n8n before 1.123.64 Credential Exposure via JWT Header

Summary

Severity

5.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-312 - Cleartext Storage of Sensitive Information

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/n8n-io/n8n/security/advisories…	vendor-advisory
https://www.vulncheck.com/advisories/n8n-before-c…	third-party-advisory

Impacted products

3 products

Vendor	Product	Version
n8n-io	n8n	Affected: 0 , < 1.123.64 (semver) Unaffected: 1.123.64 (semver)
n8n-io	n8n	Affected: 0 , < 2.30.1 (semver) Unaffected: 2.30.1 (semver)
n8n-io	n8n	Affected: 0 , < 2.29.8 (semver) Unaffected: 2.29.8 (semver)

Date Public

2026-07-08 00:00

Credits

sladkani

Show details on NVD website

JSON

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                  },
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                "timestamp": "2026-07-22T18:20:17.250346Z",
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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.

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