CVE-2026-110843
CVE-2026-110843 · n8n before 2.41.4 and 2.42.1 Unauthenticated Unbounded OAuth Client Persistence via Authorize Endpoint
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 8.2 · High · EPSS 0.3% · Fix available
- Published
- Updated
Affected products and versions
n8n
- Versions
- ≥ 0, < 2.41.4: Affected (semver)
- ≥ 2.42.0, < 2.42.1: Affected (semver)
Update to 2.41.4; Update to 2.42.1