CVE-2026-46553: NocoDB Attachment Size Limit Bypass Vulnerability

LOW
Advisory Identifier: GHSA-8rwr-f68v-cvw6
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CWE-770
Published
Advisory Summary

CVE-2026-46553 is a LOW attachment size limit bypass vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting NocoDB libraries in the npm ecosystem. The issue involves attachment size limit bypass via upload-by-url. Remediation is available in the latest vendor maintenance releases.

CVE-2026-46553 at a Glance

CVE Identifier CVE-2026-46553
GHSA Identifier GHSA-8rwr-f68v-cvw6
Severity LOW
CVSS v3.1 Base Score N/A
CWE Classification CWE-770: Allocation of Resources Without Limits or Throttling
Affected Product NocoDB
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-46553

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: Latest secure release 
npm install nocodb@Latest secure release
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-2026-46553, 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 the patched release), 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-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. 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 The upload-by-URL path did not enforce `NC_ATTACHMENT_FIELD_SIZE` against either the remote file's advertised `Content-Length` or the decoded length of a `data:` URI, allowing an authenticated user to bypass the configured per-file size limit. ### Details The attachments service now checks `NC_ATTACHMENT_FIELD_SIZE` against both the HEAD response's `content-length` and the decoded length of a `data:` URI body before fetching. The local storage plugin additionally sets `maxContentLength` on the axios download so a malicious server cannot stream past the limit. ### Impact Authenticated users with upload permission could attach files larger than the operator-configured limit, defeating storage and bandwidth caps. ### Credit This issue was reported by [@bugbunny-research](https://github.com/bugbunny-research).

CVE-2026-46553 Affected NocoDB Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
nocodb
npm/nocodb
npm
≤ 0.301.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/nocodb/nocodb/security/advisories/GHSA-8rwr-f68v-cvw6
NVD — CVE-2026-46553 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46553
NocoDB Source Repository REPOSITORY
https://github.com/nocodb/nocodb

Frequently Asked Questions

What is CVE-2026-46553?
CVE-2026-46553 is a security vulnerability in NocoDB involving Attachment Size Limit Bypass via Upload-by-URL under CWE-770: Allocation of Resources Without Limits or Throttling.
Which NocoDB versions are affected?
Affected versions include releases prior to current release patches across affected packages: nocodb.
What version fixes CVE-2026-46553?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is nocodb affected?
Yes, nocodb is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with CVE-2026-46553?
CVE-2026-46553 is classified under CWE-770: Allocation of Resources Without Limits or Throttling (The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.).
How can I check npm dependencies for CVE-2026-46553?
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-8rwr-f68v-cvw6",
  "modified" : "2026-07-20T21:16:48Z",
  "published" : "2026-05-21T20:38:58Z",
  "aliases" : [ "CVE-2026-46553" ],
  "summary" : "NocoDB: Attachment Size Limit Bypass via Upload-by-URL",
  "details" : "### Summary\nThe upload-by-URL path did not enforce `NC_ATTACHMENT_FIELD_SIZE` against either the remote file's advertised `Content-Length` or the decoded length of a `data:` URI, allowing an authenticated user to bypass the configured per-file size limit.\n\n### Details\nThe attachments service now checks `NC_ATTACHMENT_FIELD_SIZE` against both the HEAD response's `content-length` and the decoded length of a `data:` URI body before fetching. The local storage plugin additionally sets `maxContentLength` on the axios download so a malicious server cannot stream past the limit.\n\n### Impact\nAuthenticated users with upload permission could attach files larger than the operator-configured limit, defeating storage and bandwidth caps.\n\n### Credit\nThis issue was reported by [@bugbunny-research](https://github.com/bugbunny-research).",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "nocodb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.301.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/nocodb/nocodb/security/advisories/GHSA-8rwr-f68v-cvw6"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-46553"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/nocodb/nocodb"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-770" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-21T20:38:58Z",
    "nvd_published_at" : "2026-06-23T21:16:58Z"
  }
}