GHSA-8RWR-F68V-CVW6

Vulnerability from github – Published: 2026-05-21 20:38 – Updated: 2026-05-21 20:38
VLAI
Summary
NocoDB: Attachment Size Limit Bypass via Upload-by-URL
Details

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.

Severity
2.1 (Low)
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
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "nocodb"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.301.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-46553"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-21T20:38:58Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "### Summary\nThe upload-by-URL path did not enforce `NC_ATTACHMENT_FIELD_SIZE` against either the remote file\u0027s 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\u0027s `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).",
  "id": "GHSA-8rwr-f68v-cvw6",
  "modified": "2026-05-21T20:38:58Z",
  "published": "2026-05-21T20:38:58Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nocodb/nocodb/security/advisories/GHSA-8rwr-f68v-cvw6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nocodb/nocodb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "NocoDB: Attachment Size Limit Bypass via Upload-by-URL"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.