CVE-2026-46551 NocoDB: Missing File Size Enforcement in Upload-by-URL Allows Denial of Service via Disk Exhaustion
An authenticated user can cause denial of service by uploading arbitrarily large files via URL, exhausting server disk space.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-46551?
CVE-2026-46551 is a medium-severity denial of service vulnerability in nocodb, published on 23 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-770
Which versions are affected by CVE-2026-46551?
2 open source packages ship an affected version, including nocodb.
| Package | Affected | Fixed in |
|---|---|---|
nocodb npm | All versions to 0.301.3 | None |
nocodb npm | All versions to 0.301.3 | None |
How do I fix CVE-2026-46551?
No fix has been published for CVE-2026-46551 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-46551 being exploited?
There is no known exploitation of CVE-2026-46551 in the wild and no public exploit code.
Sources
Also known as GHSA-99vc-2jx2-688p.