CVE-2026-65589 | n8n versions before 1.123.64 fail to properly mask custom HT… | CVSS 5.1 MEDIUM

Description

n8n versions before 1.123.64 fail to properly mask custom HTTP header credentials in LLM sub-node execution data, writing plaintext API keys and secrets to workflow execution records. Authenticated users with access to execution data can read exposed header values and credentials that persist in the database and can be exported.

Metadata

CVE ID: CVE-2026-65589
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-07-22 10:45 UTC
Published: 2026-07-22 11:21 UTC
Last updated: 2026-07-22 11:21 UTC
Primary CWE: CWE-532
Insertion of Sensitive Information into Log File
Vendor / Product: n8n-io / n8n
Sources: cve.org · NVD

Severity & Metrics

5.1 MEDIUM CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:N

Affected products (3)

Vendor	Product	Platform	Versions
n8n-io	n8n	—	0 < 1.123.64, 1.123.64
n8n-io	n8n	—	0 < 2.30.1, 2.30.1
n8n-io	n8n	—	0 < 2.29.8, 2.29.8

Weakness (CWE)

CWE	Source	Description
CWE-532	cna	Insertion of Sensitive Information into Log File

CVSS scores (1)

Score	Severity	Version	Source	Vector
5.1	MEDIUM	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:N

References (2)

GitHub Security Advisory (GHSA-89gh-3pgc-v5h2) https://github.com/n8n-io/n8n/security/advisories/GHSA-89gh-3pgc-v5h2
VulnCheck Advisory: n8n before 1.123.64 Credential Exposure via LLM Node Execution Data https://www.vulncheck.com/advisories/n8n-before-credential-exposure-via-llm-node-execution-data