CVE-2026-77080Network attack vector

Arbitrary file read and write via Snowflake commands

Published Aug 20, 2026 · Updated Aug 20, 2026

Arbitrary file read and write in n8n before 1.123.69, 2.x before 2.33.4, and 2.34.x before 2.34.1 lets remote authenticated users access host files. The Snowflake node forwards free-form Execute Query text, including client-side file-transfer commands, directly to the Snowflake SDK and skips n8n's normal file-access restrictions. Exploitation requires authenticated access to n8n plus usable Snowflake credentials, and the documented impact is reading local files from the n8n host or overwriting existing files as the n8n process user.

CVSS severity8.7
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file read and write in n8n before 1.123.69, 2.x before 2.33.4, and 2.34.x before 2.34.1 lets remote authenticated users access host files. The Snowflake node forwards free-form Execute Query text, including client-side file-transfer commands, directly to the Snowflake SDK and skips n8n's normal file-access restrictions. Exploitation requires authenticated access to n8n plus usable Snowflake credentials, and the documented impact is reading local files from the n8n host or overwriting existing files as the n8n process user.

The record

CVE
CVE-2026-77080
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-78, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <1.123.69
  2. Affected versionversion=0 <2.33.4
  3. Affected versionversion=0 <2.34.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=0 <1.123.69; version=0 <2.33.4; version=0 <2.34.1

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
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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