CVE-2026-42226
published 2026-05-04CVE-2026-42226: n8n is an open source workflow automation platform. Prior to versions 1.123.33 and 2.17.5, the dynamic-node-parameters endpoints did not verify whether the…
PriorityP349high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
0.26%
17.2th percentile
n8n is an open source workflow automation platform. Prior to versions 1.123.33 and 2.17.5, the dynamic-node-parameters endpoints did not verify whether the authenticated caller was authorized to use a supplied credential reference. An authenticated user with access to a shared workflow could supply a foreign credential ID in the request body, causing the backend to decrypt and use that credential in a helper execution path where the caller also controls the destination URL. This allowed the caller to force the backend to authenticate against attacker-controlled infrastructure using a credential belonging to another user, effectively exfiltrating a reusable API key. The issue is not limited to any single node type; any node that resolves credentials dynamically through these endpoints may be affected. This issue has been patched in versions 1.123.33, 2.17.5, and 2.18.0.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| n8n-io | n8n | < 1.123.33 | 1.123.33 |
| n8n-io | n8n | — | — |
| n8n | n8n | < 1.123.33 | 1.123.33 |
| n8n | n8n | >= 0 < 1.123.33 | 1.123.33 |
| n8n | n8n | >= 2.17.0 < 2.17.5 | 2.17.5 |
| n8n | n8n | >= 2.17.0 < 2.17.5 | 2.17.5 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvdv4.07.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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VulDB
n8n-io n8n up to 1.123.32/2.17.4 authorization (GHSA-r4v6-9fqc-w5jr)
vuldb·2026-05-04·CVSS 7.1
CVE-2026-42226 [HIGH] n8n-io n8n up to 1.123.32/2.17.4 authorization (GHSA-r4v6-9fqc-w5jr)
A vulnerability marked as critical has been reported in n8n-io n8n up to 1.123.32/2.17.4. The affected element is an unknown function. This manipulation causes missing authorization.
This vulnerability is registered as CVE-2026-42226. Remote exploitation of the attack is possible. No exploit is available.
It is suggested to upgrade the affected component.
GHSA
n8n's Credential Authorization Bypass in dynamic-node-parameters Allows Foreign API Key Replay
ghsa·2026-04-29
CVE-2026-42226 [HIGH] CWE-862 n8n's Credential Authorization Bypass in dynamic-node-parameters Allows Foreign API Key Replay
n8n's Credential Authorization Bypass in dynamic-node-parameters Allows Foreign API Key Replay
## Impact
The `dynamic-node-parameters` endpoints did not verify whether the authenticated caller was authorized to use a supplied credential reference. An authenticated user with access to a shared workflow could supply a foreign credential ID in the request body, causing the backend to decrypt and use that credential in a helper execution path where the caller also controls the destination URL. This allowed the caller to force the backend to authenticate against attacker-controlled infrastructure using a credential belonging to another user, effectively exfiltrating a reusable API key.
The issue is not limited to any single node type; any node that resolves credentials dynamically through the
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-05-04
Published