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GHSA-777w-rpr6-c52h
No affected components available
Impact
JWTs issued through the Token Exchange module were assigned all Public API key scopes, regardless of the acting user's actual role. A low-privileged user who could obtain a valid external JWT trusted by a configured issuer could therefore use the resulting access token to invoke administrator-only Public API operations, such as role escalation, user creation, and user deletion.
The issue only affects instances where the Token Exchange feature and the Public API are enabled (N8N_TOKEN_EXCHANGE_ENABLED=true, N8N_ENV_FEAT_TOKEN_EXCHANGE=true) and the attacker can obtain an external JWT accepted by a configured trusted key. Role escalation additionally requires an Advanced Permissions license; Community Package installation additionally requires N8N_COMMUNITY_PACKAGES_ENABLED=true and N8N_UNVERIFIED_PACKAGES_ENABLED=true.
Patches
The issue has been fixed in n8n version 2.30.1 and 2.29.8. Users should upgrade to this version or later to remediate the vulnerability.
Workarounds
If upgrading is not immediately possible, administrators should consider the following temporary mitigations:
- Disable the Token Exchange feature by setting
N8N_TOKEN_EXCHANGE_ENABLED=falseorN8N_ENV_FEAT_TOKEN_EXCHANGE=false. - If Token Exchange cannot be disabled, restrict Public API access at the network level to trusted clients only.
- Disable unverified Community Package installation by setting
N8N_UNVERIFIED_PACKAGES_ENABLED=falseto eliminate the code execution path.
These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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