CVE-2026-24766: Nocodb Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-95ff-46g6-6gw9
Share
CVSS 4.9
CWE-1321
Published
Advisory Summary

CVE-2026-24766 is a MODERATE (CVSS 4.9) denial of service vulnerability (CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')) affecting Nocodb libraries in the npm ecosystem. The issue involves nocodb has prototype pollution in connection test endpoint, leading to dos. Remediation is available by upgrading affected packages to version 0.301.0.

CVE-2026-24766 at a Glance

CVE Identifier CVE-2026-24766
GHSA Identifier GHSA-95ff-46g6-6gw9
Severity MODERATE
CVSS v3.1 Base Score 4.9
CWE Classification CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Affected Product Nocodb
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 4.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-24766

To remediate this vulnerability, upgrade all affected Nocodb dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

nocodb fixed: 0.301.0 
npm install nocodb@0.301.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls nocodb

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-24766, inspect your project dependencies using npm:

npm ls nocodb

Analyze the terminal output to locate any version of Nocodb in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.301.0), your application is affected.

Note: The npm ls nocodb command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution'), where the product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. In Nocodb, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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`): ```typescript 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()`: ```typescript 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.

CVE-2026-24766 Affected Nocodb Versions

1 component(s)
Fixed Versions:
0.301.0
Product / Package Ecosystem Affected Versions Fixed Version
nocodb
npm/nocodb
npm
< 0.301.0
0.301.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/nocodb/nocodb/security/advisories/GHSA-95ff-46g6-6gw9
NVD — CVE-2026-24766 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-24766
Nocodb Source Repository REPOSITORY
https://github.com/nocodb/nocodb
Nocodb Release RELEASE
https://github.com/nocodb/nocodb/releases/tag/0.301.0

Frequently Asked Questions

What is CVE-2026-24766?
CVE-2026-24766 is a security vulnerability in Nocodb involving NocoDB has Prototype Pollution in Connection Test Endpoint, Leading to DoS under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').
Which Nocodb versions are affected?
Affected versions include releases prior to 0.301.0 across affected packages: nocodb.
What version fixes CVE-2026-24766?
Upgrading to 0.301.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is nocodb affected?
Yes, nocodb is affected in releases prior to 0.301.0. Upgrade your dependency to 0.301.0 or later.
What is the CVSS score of CVE-2026-24766?
CVE-2026-24766 has a CVSS v3.1 base score of 4.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-24766?
CVE-2026-24766 is classified under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.).
How can I check npm dependencies for CVE-2026-24766?
Run the dependency tree command: 'npm ls nocodb'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-95ff-46g6-6gw9",
  "modified" : "2026-01-28T21:41:26Z",
  "published" : "2026-01-28T21:41:26Z",
  "aliases" : [ "CVE-2026-24766" ],
  "summary" : "NocoDB has Prototype Pollution in Connection Test Endpoint, Leading to DoS",
  "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[]) => {\n  // ...\n  Object.keys(source).forEach((key) => {\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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "nocodb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.301.0"
      } ]
    } ]
  } ],
  "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"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1321" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-28T21:41:26Z",
    "nvd_published_at" : "2026-01-28T21:16:12Z"
  }
}