high7.6
CVE-2026-103259
n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain a session token leakage vulnerability in the Dynamic Credentials authorize and revoke endpoints.
Impact
n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain a session token leakage vulnerability in the Dynamic Credentials authorize and revoke endpoints. Attackers with resolver registration capability can capture collaborators' session tokens by setting a fallback resolver to an attacker-controlled endpoint during the account connection flow, enabling unauthorized credential access.
Affected products
| Product | Affected versions |
|---|---|
| N8n | before 2.39.6 |
| 2.40.0 | before 2.40.1 |
Versions were read from the advisory text. No structured product data has been published for this record yet.