CVE-2026-72769Network attack vector

Authenticated code execution via prototype pollution

Published Aug 11, 2026 · Updated Aug 11, 2026

Prototype pollution in n8n before 1.123.67, 2.31.5, and 2.32.1 allows remote authenticated users to execute code. The VM expression engine's array-element access returns a host built-in reference, allowing a workflow expression to modify its prototype in the main process. The attacker must be able to create or edit a workflow expression; successful exploitation escapes the sandbox and compromises the n8n process.

CVSS severity8.7
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Prototype pollution in n8n before 1.123.67, 2.31.5, and 2.32.1 allows remote authenticated users to execute code. The VM expression engine's array-element access returns a host built-in reference, allowing a workflow expression to modify its prototype in the main process. The attacker must be able to create or edit a workflow expression; successful exploitation escapes the sandbox and compromises the n8n process.

The record

CVE
CVE-2026-72769
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-1321, CAPEC-77, CAPEC-180, CAPEC-1, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 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 <1.123.67
  2. Affected versionversion=0 <2.31.5
  3. Affected versionversion=0 <2.32.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=0 <1.123.67; version=0 <2.31.5; version=0 <2.32.1

Published CVSS scores

8.7n8nCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
6.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

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-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CAPEC-77Manipulating User-Controlled Variables
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
CAPEC-1Accessing Functionality Not Properly Constrained by ACLs
T1059.007Command and Scripting Interpreter: JavaScript/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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