CVE-2026-65591Network attack vector

Authenticated code execution via computed-member sanitizer bypass

Published Jul 22, 2026 · Updated Jul 22, 2026

Expression language injection in affected n8n releases allows remote authenticated users to execute code as the n8n process. The legacy expression evaluator's computed-member sanitizer accepts a crafted expression that escapes its restrictions and reaches host execution. Workflow create or modify permission is required, and the vulnerable legacy engine is enabled by default in affected releases.

CVSS severity8.9
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Expression language injection in affected n8n releases allows remote authenticated users to execute code as the n8n process. The legacy expression evaluator's computed-member sanitizer accepts a crafted expression that escapes its restrictions and reaches host execution. Workflow create or modify permission is required, and the vulnerable legacy engine is enabled by default in affected releases.

The record

CVE
CVE-2026-65591
Published
Jul 22, 2026
Updated
Jul 22, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-917, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.123.64
  2. Affected versionversion=0 <2.29.8
  3. Affected versionversion=0 <2.30.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=0 <1.123.64; version=0 <2.29.8; version=0 <2.30.1

Published CVSS scores

8.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-917Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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