Vulnerability-Lookup

CVE-2026-56269 (GCVE-0-2026-56269)

Vulnerability from cvelistv5 – Published: 2026-06-24 11:53 – Updated: 2026-06-24 14:58

Title

Flowise - Weak Default Token Hash Secret in JWT Token Encryption

Summary

Flowise before 3.1.0 (npm package flowise, versions 3.0.13 and earlier) uses a weak hardcoded default value 'Secre$t' for the TOKEN_HASH_SECRET environment variable in packages/server/src/enterprise/utils/tempTokenUtils.ts when the variable is not configured. This secret derives the AES-256-CBC key used to encrypt user IDs and workspace IDs in the 'meta' field of JWT tokens. An attacker who knows the default secret can decrypt this metadata to extract internal user and workspace identifiers, and re-encrypt manipulated values such as altered user or workspace IDs. Because the JWT signature is validated separately, decrypting or tampering with this metadata does not by itself grant access, but the disclosure of internal identifiers and possible metadata manipulation could aid privilege escalation or unauthorized data access.

Severity

4.3 (Medium)


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

4.6 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-24 14:58 UTC

CWE

CWE-798 - Use of Hard-coded Credentials

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6779 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/FlowiseAI/Flowise/security/adv…	vendor-advisory
https://www.vulncheck.com/advisories/flowise-weak…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Flowise	Flowise	Affected: 0 , < 3.1.0 (semver) Unaffected: 3.1.0 (semver) cpe:2.3:a:flowiseai:flowise::::::::

Date Public

2026-04-15 00:00

Credits

kolega-ai-dev

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-56269

Vulnerability from fkie_nvd - Published: 2026-06-24 13:16 - Updated: 2026-10-25 23:10

Severity

4.6 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:L/A:N

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-m7mq-85xj-9x33	Mitigation, Vendor Advisory
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/flowise-weak-default-token-hash-secret-in-jwt-token-encryption	Third Party Advisory

Impacted products

	Vendor	Product	Version
	flowiseai	flowise	*

JSON

To clipboard

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    {
      "lang": "en",
      "value": "Flowise before 3.1.0 (npm package flowise, versions 3.0.13 and earlier) uses a weak hardcoded default value \u0027Secre$t\u0027 for the TOKEN_HASH_SECRET environment variable in packages/server/src/enterprise/utils/tempTokenUtils.ts when the variable is not configured. This secret derives the AES-256-CBC key used to encrypt user IDs and workspace IDs in the \u0027meta\u0027 field of JWT tokens. An attacker who knows the default secret can decrypt this metadata to extract internal user and workspace identifiers, and re-encrypt manipulated values such as altered user or workspace IDs. Because the JWT signature is validated separately, decrypting or tampering with this metadata does not by itself grant access, but the disclosure of internal identifiers and possible metadata manipulation could aid privilege escalation or unauthorized data access."
    },
    {
      "lang": "es",
      "value": "Flowise anterior a 3.1.0 (paquete npm flowise, versiones 3.0.13 y anteriores) utiliza un valor predeterminado d\u00e9bil codificado de forma r\u00edgida \u2019Secre$t\u2019 para la variable de entorno TOKEN_HASH_SECRET en packages/server/src/enterprise/utils/tempTokenUtils.ts cuando la variable no est\u00e1 configurada. Este secreto deriva la clave AES-256-CBC utilizada para cifrar ID de usuario e ID de espacio de trabajo en el campo \u2019meta\u2019 de los tokens JWT. Un atacante que conoce el secreto predeterminado puede descifrar estos metadatos para extraer identificadores internos de usuario y de espacio de trabajo, y volver a cifrar valores manipulados como ID de usuario o de espacio de trabajo alterados. Debido a que la firma JWT se valida por separado, descifrar o manipular estos metadatos no otorga acceso por s\u00ed mismo, pero la divulgaci\u00f3n de identificadores internos y la posible manipulaci\u00f3n de metadatos podr\u00eda facilitar la escalada de privilegios o el acceso no autorizado a datos."
    }
  ],
  "id": "CVE-2026-56269",
  "lastModified": "2026-10-25T23:10:00.167",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 4.6,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 0.3,
        "impactScore": 4.2,
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "HIGH",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:A/VC:H/VI:L/VA:N/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-56269",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-24T14:58:08.791171Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-24T13:16:35.400",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-m7mq-85xj-9x33"
    },
    {
      "source": "disclosure@vulncheck.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.vulncheck.com/advisories/flowise-weak-default-token-hash-secret-in-jwt-token-encryption"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-798"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-M7MQ-85XJ-9X33

Vulnerability from github – Published: 2026-04-16 21:22 – Updated: 2026-07-20 21:31

Summary

Flowise: Weak Default Token Hash Secret

Details

Detection Method: Kolega.dev Deep Code Scan

Attribute	Value
Location	packages/server/src/enterprise/utils/tempTokenUtils.ts:31-34
Practical Exploitability	Medium
Developer Approver	faizan@kolega.ai

Description

The encryption key for token encryption has a weak default value 'Secre$t' when TOKEN_HASH_SECRET environment variable is not set.

Affected Code

const key = crypto
    .createHash('sha256')
    .update(process.env.TOKEN_HASH_SECRET || 'Secre$t')
    .digest()

Evidence

The default value 'Secre$t' is hardcoded in the source code and is cryptographically weak. This key is used to encrypt user IDs and workspace IDs in JWT tokens.

Impact

Token forgery - attackers can decrypt and manipulate encrypted token metadata, potentially changing user IDs or workspace IDs to escalate privileges or access unauthorized data.

Recommendation

Require TOKEN_HASH_SECRET to be set as a strong random value in environment variables. Throw an error on startup if not configured. Use a minimum of 32 bytes of entropy.

Notes

The TOKEN_HASH_SECRET has a weak hardcoded default 'Secre$t' (lines 31-34 and 50-53). This secret is used to derive an AES-256-CBC encryption key for encrypting sensitive metadata (user ID and workspace ID) embedded in JWT tokens via encryptToken() called at line 394 of passport/index.ts. If TOKEN_HASH_SECRET is not configured, an attacker knowing the default can decrypt the 'meta' field in JWTs to extract user IDs and workspace IDs. While this alone doesn't grant access (the JWT signature is separate), it leaks internal identifiers that could aid other attacks. The .env.example shows '# TOKEN_HASH_SECRET='popcorn'' - another weak value, and it's commented out suggesting it's optional. The application should require this secret to be explicitly set with a strong random value.

Severity

5.6 (Medium)


                  
                    CVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N

4.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.0.13"
      },
      "package": {
        "ecosystem": "npm",
        "name": "flowise"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-56269"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-798"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-16T21:22:36Z",
    "nvd_published_at": "2026-06-24T13:16:35Z",
    "severity": "MODERATE"
  },
  "details": "**Detection Method:** Kolega.dev Deep Code Scan\n\n| Attribute | Value |\n|---|---|\n| Location | packages/server/src/enterprise/utils/tempTokenUtils.ts:31-34 |\n| Practical Exploitability | Medium |\n| Developer Approver | faizan@kolega.ai |\n\n### Description\nThe encryption key for token encryption has a weak default value \u0027Secre$t\u0027 when TOKEN_HASH_SECRET environment variable is not set.\n\n### Affected Code\n```\nconst key = crypto\n    .createHash(\u0027sha256\u0027)\n    .update(process.env.TOKEN_HASH_SECRET || \u0027Secre$t\u0027)\n    .digest()\n```\n\n### Evidence\nThe default value \u0027Secre$t\u0027 is hardcoded in the source code and is cryptographically weak. This key is used to encrypt user IDs and workspace IDs in JWT tokens.\n\n### Impact\nToken forgery - attackers can decrypt and manipulate encrypted token metadata, potentially changing user IDs or workspace IDs to escalate privileges or access unauthorized data.\n\n### Recommendation\nRequire TOKEN_HASH_SECRET to be set as a strong random value in environment variables. Throw an error on startup if not configured. Use a minimum of 32 bytes of entropy.\n\n### Notes\nThe TOKEN_HASH_SECRET has a weak hardcoded default \u0027Secre$t\u0027 (lines 31-34 and 50-53). This secret is used to derive an AES-256-CBC encryption key for encrypting sensitive metadata (user ID and workspace ID) embedded in JWT tokens via encryptToken() called at line 394 of passport/index.ts. If TOKEN_HASH_SECRET is not configured, an attacker knowing the default can decrypt the \u0027meta\u0027 field in JWTs to extract user IDs and workspace IDs. While this alone doesn\u0027t grant access (the JWT signature is separate), it leaks internal identifiers that could aid other attacks. The .env.example shows \u0027# TOKEN_HASH_SECRET=\u0027popcorn\u0027\u0027 - another weak value, and it\u0027s commented out suggesting it\u0027s optional. The application should require this secret to be explicitly set with a strong random value.",
  "id": "GHSA-m7mq-85xj-9x33",
  "modified": "2026-07-20T21:31:50Z",
  "published": "2026-04-16T21:22:36Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-m7mq-85xj-9x33"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56269"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/FlowiseAI/Flowise"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/flowise-weak-default-token-hash-secret-in-jwt-token-encryption"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:A/VC:H/VI:L/VA:N/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"
    }
  ],
  "summary": "Flowise: Weak Default Token Hash Secret"
}

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.
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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.

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CVE-2026-56269 (GCVE-0-2026-56269)

FKIE_CVE-2026-56269

GHSA-M7MQ-85XJ-9X33

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