CVE-2025-61917Network attack vector

Authenticated memory disclosure via unsafe buffer allocation

Published Feb 4, 2026 · Updated Feb 4, 2026

Information disclosure in n8n 1.65.0 through 1.114.2 allows remote authenticated users to read residual process memory via task code. The JavaScript task runner exposed Buffer.allocUnsafe() and Buffer.allocUnsafeSlow() directly, returning uninitialized bytes rather than zero-filled buffers. Exploitation requires Task Runners enabled, the Code Node available, and permission to execute task code; disclosure is limited to residual data in the same Node.js process.

CVSS severity7.7
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in n8n 1.65.0 through 1.114.2 allows remote authenticated users to read residual process memory via task code. The JavaScript task runner exposed Buffer.allocUnsafe() and Buffer.allocUnsafeSlow() directly, returning uninitialized bytes rather than zero-filled buffers. Exploitation requires Task Runners enabled, the Code Node available, and permission to execute task code; disclosure is limited to residual data in the same Node.js process.

The record

CVE
CVE-2025-61917
Published
Feb 4, 2026
Updated
Feb 4, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-668, CWE-200, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 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=>= 1.65.0, < 1.114.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=>= 1.65.0, < 1.114.3

Published CVSS scores

7.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A: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-668Exposure of Resource to Wrong Sphere
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1005Data from Local System

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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