CVE-2026-65591 PUBLISHED

n8n before 1.123.64 Sanitizer Bypass Remote Code Execution

Assigner: VulnCheck
Reserved: 22.07.2026 Published: 22.07.2026 Updated: 22.07.2026

n8n contains a sanitizer bypass vulnerability in the legacy expression evaluator's computed-member handler. An authenticated user with workflow create or modify permissions can craft a malicious expression to bypass the sanitizer and achieve host-level code execution as the n8n process. The legacy expression engine is the default in affected versions. Fixed in n8n 1.123.64, 2.29.8, and 2.30.1.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L
CVSS Score: 8.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	Present	Availability	High	Availability	Low
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	n8n-io
Product	n8n
Versions	Default: unaffected affected from 0 to 1.123.64 (excl.) Version 1.123.64 is unaffected

Vendor	n8n-io
Product	n8n
Versions	Default: unaffected affected from 0 to 2.30.1 (excl.) Version 2.30.1 is unaffected

Vendor	n8n-io
Product	n8n
Versions	Default: unaffected affected from 0 to 2.29.8 (excl.) Version 2.29.8 is unaffected

Credits

Dremig reporter

References

Problem Types

Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection') CWE