High severity · published Jul 22, 2026
CVE-2026-65591
n8n before 1.123.64 Sanitizer Bypass Remote Code Execution
8.8
CVSS
0.7%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N8
n8n · n8n-io
before 1.123.64; before 2.30.1; before 2.29.8 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-65591
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-65591
Mitigation
https://github.com/n8n-io/n8n/security/advisories/GHSA-pm35-fqvh-cq5g
Third Party Advisory
https://www.vulncheck.com/advisories/n8n-before-sanitizer-bypass-remote-code-execution
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