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n8n: Custom Header Credential Values Leaked in Plaintext into LLM Node Execution Data

🗓️ 22 Jul 2026 22:54:01Reported by GitHub Advisory DatabaseType 
github
 github🔗 github.com👁 2 Views

Impact Custom HTTP headers configured in credentials for certain LLM sub-nodes (including OpenAI, Anthropic, and Lemonade) are masked in the n8n UI but are written in plaintext into execution data during workflow runs. Any authenticated user with ...

Related
Detection
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB		CVE-2026-65589
22 Jul 202611:21
–attackerkb
CVE		CVE-2026-65589
22 Jul 202611:21
–cve
Cvelist		CVE-2026-65589 n8n before 1.123.64 Credential Exposure via LLM Node Execution Data
22 Jul 202611:21
–cvelist
EUVD		EUVD-2026-47633
22 Jul 202611:21
–euvd
Github Security Blog		Duplicate Advisory: Custom Header Credential Values Leaked in Plaintext into LLM Node Execution Data
22 Jul 202612:32
–github
NVD		CVE-2026-65589
22 Jul 202612:18
–nvd
OSV		GHSA-89GH-3PGC-V5H2 n8n: Custom Header Credential Values Leaked in Plaintext into LLM Node Execution Data
22 Jul 202622:54
–osv
OSV		GHSA-FMVG-VHQQ-R2MJ Duplicate Advisory: Custom Header Credential Values Leaked in Plaintext into LLM Node Execution Data
22 Jul 202612:32
–osv
Patchstack		NPM: n8n: Custom Header Credential Values Leaked in Plaintext into LLM Node Execution Data
22 Jul 202622:54
–patchstack
Positive Technologies		PT-2026-63347
22 Jul 202600:00
–ptsecurity
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Vulners
Node
OR
n8nn8nRange2.0.0-rc.0–2.29.8npm
n8nn8nRange2.30.0–2.30.1npm
n8nn8nRange<1.123.64npm

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22 Jul 2026 22:54Current
5.8Medium risk
Vulners AI Score5.8
CVSS 45.1
CWE-532
2