Vulnerability-Lookup

CVE-2026-24766 (GCVE-0-2026-24766)

Vulnerability from cvelistv5 – Published: 2026-01-28 20:27 – Updated: 2026-01-29 18:01

Title

NocoDB Vulnerable to Prototype Pollution in Connection Test Endpoint, Leading to DoS

Summary

NocoDB is software for building databases as spreadsheets. Prior to version 0.301.0, an authenticated user with org-level-creator permissions can exploit prototype pollution in the `/api/v2/meta/connection/test` endpoint, causing all database write operations to fail application-wide until server restart. While the pollution technically bypasses SUPER_ADMIN authorization checks, no practical privileged actions can be performed because database operations fail immediately after pollution. Version 0.301.0 patches the issue.

Severity ?

4.9 (Medium)


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

CWE

CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Assigner

GitHub_M

References

URL

Tags

https://github.com/nocodb/nocodb/security/advisor…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	nocodb	nocodb	Affected: < 0.301.0

Show details on NVD website

JSON

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FKIE_CVE-2026-24766

Vulnerability from fkie_nvd - Published: 2026-01-28 21:16 - Updated: 2026-01-29 16:31

Severity ?

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

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/nocodb/nocodb/security/advisories/GHSA-95ff-46g6-6gw9

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "NocoDB is software for building databases as spreadsheets. Prior to version 0.301.0, an authenticated user with org-level-creator permissions can exploit prototype pollution in the `/api/v2/meta/connection/test` endpoint, causing all database write operations to fail application-wide until server restart. While the pollution technically bypasses SUPER_ADMIN authorization checks, no practical privileged actions can be performed because database operations fail immediately after pollution. Version 0.301.0 patches the issue."
    }
  ],
  "id": "CVE-2026-24766",
  "lastModified": "2026-01-29T16:31:00.867",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
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          "baseScore": 4.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
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  },
  "published": "2026-01-28T21:16:12.103",
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      "source": "security-advisories@github.com",
      "url": "https://github.com/nocodb/nocodb/security/advisories/GHSA-95ff-46g6-6gw9"
    }
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  "vulnStatus": "Undergoing Analysis",
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          "value": "CWE-1321"
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      "type": "Primary"
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}

GHSA-95FF-46G6-6GW9

Vulnerability from github – Published: 2026-01-28 21:41 – Updated: 2026-01-28 21:41

Summary

NocoDB has Prototype Pollution in Connection Test Endpoint, Leading to DoS

Details

Summary

An authenticated user with org-level-creator permissions can exploit prototype pollution in the /api/v2/meta/connection/test endpoint, causing all database write operations to fail application-wide until server restart.

While the pollution technically bypasses SUPER_ADMIN authorization checks, no practical privileged actions can be performed because database operations fail immediately after pollution.

Details

The deepMerge() function in packages/nocodb/src/utils/dataUtils.ts does not sanitize the following keys: (__proto__, constructor, prototype):

export const deepMerge = (target: any, ...sources: any[]) => {
  // ...
  Object.keys(source).forEach((key) => {
    if (isMergeableObject(source[key])) {
      if (!target[key]) target[key] = Array.isArray(source[key]) ? [] : {};
      deepMerge(target[key], source[key]);  // Recursively merges __proto__
    } else {
      target[key] = source[key];
    }
  });
  // ...
};

The testConnection endpoint (packages/nocodb/src/controllers/utils.controller.ts) passes user-controlled input directly to deepMerge():

config = await integration.getConfig();
deepMerge(config, body);

When an attacker sends {"__proto__": {"super": true}}, the super property is written to Object.prototype, affecting all plain objects in the Node.js process.

Impact

Pollutes Object.prototype globally, breaking all subsequent database write operations for all users until process restart.

Severity ?

4.9 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "nocodb"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.301.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-24766"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1321"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-28T21:41:26Z",
    "nvd_published_at": "2026-01-28T21:16:12Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nAn authenticated user with org-level-creator permissions can exploit prototype pollution in the `/api/v2/meta/connection/test` endpoint, causing all database write operations to fail application-wide until server restart.\n\nWhile the pollution technically bypasses SUPER_ADMIN authorization checks, no practical privileged actions can be performed because database operations fail immediately after pollution.\n\n### Details\n\nThe `deepMerge()` function in `packages/nocodb/src/utils/dataUtils.ts` does not sanitize the following keys: (`__proto__`, `constructor`, `prototype`):\n\n```typescript\nexport const deepMerge = (target: any, ...sources: any[]) =\u003e {\n  // ...\n  Object.keys(source).forEach((key) =\u003e {\n    if (isMergeableObject(source[key])) {\n      if (!target[key]) target[key] = Array.isArray(source[key]) ? [] : {};\n      deepMerge(target[key], source[key]);  // Recursively merges __proto__\n    } else {\n      target[key] = source[key];\n    }\n  });\n  // ...\n};\n```\n\nThe `testConnection` endpoint (`packages/nocodb/src/controllers/utils.controller.ts`) passes user-controlled input directly to `deepMerge()`:\n\n```typescript\nconfig = await integration.getConfig();\ndeepMerge(config, body);\n```\n\nWhen an attacker sends `{\"__proto__\": {\"super\": true}}`, the `super` property is written to `Object.prototype`, affecting all plain objects in the Node.js process.\n\n## Impact\n\nPollutes Object.prototype globally, breaking all subsequent database write operations for all users until process restart.",
  "id": "GHSA-95ff-46g6-6gw9",
  "modified": "2026-01-28T21:41:26Z",
  "published": "2026-01-28T21:41:26Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nocodb/nocodb/security/advisories/GHSA-95ff-46g6-6gw9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24766"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nocodb/nocodb"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nocodb/nocodb/releases/tag/0.301.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "NocoDB has Prototype Pollution in Connection Test Endpoint, Leading to DoS"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

CVE-2026-24766 (GCVE-0-2026-24766)

FKIE_CVE-2026-24766

GHSA-95FF-46G6-6GW9

Summary

Details

Impact

Tags

Sightings

Nomenclature