n8n before 2.41.4 and 2.42.1 Unauthenticated Unbounded OAuth Client Persistence via Authorize Endpoint
n8n before 2.41.4 and 2.42.x before 2.42.1 contains an uncontrolled resource consumption vulnerability in the unauthenticated OAuth authorize endpoint, which resolves clients by URL path but stores the caller's raw identifier as the record key. Unauthenticated attackers can send identifiers differing only in their query string to create unlimited first-party client records that bypass the registration cap, growing the database until the disk fills.
CVE-2026-110843
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-110843
n8n
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "n8n-io",
"product": "n8n",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "2.41.4",
"versionType": "semver"
},
{
"status": "affected",
"version": "2.42.0",
"lessThan": "2.42.1",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/n8n",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-110843
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #32779 · Revision 1
- Added to Heist Feed
- Publisher date