Authenticated code execution via unchecked Git repository path
Published Jan 8, 2026 · Updated Jan 8, 2026
Arbitrary file write in the n8n Git node 0.123.0 through 1.121.2 allows remote authenticated users to execute code on the host. The Git node passes an attacker-chosen repository path to simple-git without checking whether the path is blocked, allowing clone output to overwrite protected files. Workflow access is required; successful exploitation runs attacker-controlled code with the n8n service account and can compromise the instance.
Summary
What happened
Arbitrary file write in the n8n Git node 0.123.0 through 1.121.2 allows remote authenticated users to execute code on the host. The Git node passes an attacker-chosen repository path to simple-git without checking whether the path is blocked, allowing clone output to overwrite protected files. Workflow access is required; successful exploitation runs attacker-controlled code with the n8n service account and can compromise the instance.
The record
- CVE
- CVE-2026-21877
- Published
- Jan 8, 2026
- Updated
- Jan 8, 2026
- Vendor
- n8n
- Product
- n8n
- Classifications
- CWE-94, CWE-434
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 8, 2026CVE publishedPublication date reported by the CVE source.
- Jan 8, 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.
- Affected versionversion=< 1.121.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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