Vulnerability · Published Jun 23, 2026 · Assigned by GitHub_M

CVE-2026-46551NocoDB: Missing File Size Enforcement in Upload-by-URL Allows Denial of Service via Disk Exhaustion

Medium 6.5

In plain English

A medium-severity resource allocation without limits in nocodb from nocodb. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 64.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

NocoDB is software for building databases as spreadsheets. Prior to 2026.04.4, the uploadViaURL path in the v1/v2 attachment API did not enforce NC_ATTACHMENT_FIELD_SIZE against the remote content-length or against the response stream. An authenticated user (Editor+) could direct the server to download arbitrarily large files, exhausting disk space and causing denial of service. In packages/nocodb/src/services/attachments.service.ts, the HEAD probe read content-length but never compared it to NC_ATTACHMENT_FIELD_SIZE; the subsequent storageAdapter.fileCreateByUrl() performed the download without maxContentLength. This vulnerability is fixed in 2026.04.4.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	nocodb	no fix listed	GHSA-99vc-2jx2-688p

Affected products (as reported)

Vendor	Product	Versions
nocodb	nocodb	< 2026.04.4

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/nocodb/nocodb/security/advisories/GHSA-99vc-2jx2-688p x_refsource_CONFIRM