CVE-2026-54305High· 9.9▾ Twilightn8n: Cross-Tenant Credential Takeover via Dynamic Credentials EE Endpoints
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 54.5 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.3%
0.3% → 0.4%
Three EE endpoints used by the Dynamic Credentials feature accepted any authenticated n8n session without performing per-resource ownership or scope checks on the target workflow or credential. An authenticated user with no project membership or credential sharing relationship could enumerate credential identifiers, names, and types referenced by any private workflow in the instance, initiate an OAuth authorization flow against another user's credential to overwrite its stored tokens with tokens bound to an account they control, or revoke another user's stored credential tokens entirely.
Workflows relying on a hijacked credential would subsequently execute under the attacker's OAuth identity, enabling data exfiltration to attacker-controlled external services and persistent takeover of integrations. Token revocation would break affected workflows.
This issue only affects Enterprise instances where the Dynamic Credentials feature is enabled.
The issue has been fixed in n8n versions 1.123.55, 2.25.7, and 2.26.2. Users should upgrade to one of these versions or later to remediate the vulnerability.
If upgrading is not immediately possible, administrators should consider the following temporary mitigations:
N8N_ENV_FEAT_DYNAMIC_CREDENTIALS.These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
n8n < 1.123.55n8n >= 2.26.0, < 2.26.2n8n >= 2.0.0-rc.0, < 2.25.7Upgrade to a patched release:
n8n 1.123.55n8n 2.26.2n8n 2.25.7Connected by shared product, vendor, weakness, or advisory.
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