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GHSA-mhrx-qhrj-673w

CriticalCVSS 9 / 10
Published May 14, 2026·Last modified Jul 20, 2026
Affected Components(0)

No affected components available

Description

Impact

An attacker with write access to the git repository connected to an n8n Source Control configuration could commit a malicious Data Table JSON file containing a crafted column name. When an administrator performed a Source Control Pull, n8n imported the file and could lead to SQL injection on the internal PostgreSQL instance.

Exploitation requires all of the following conditions:

  • The n8n instance uses PostgreSQL as its database backend.
  • The Source Control feature is enabled and connected to a repository the attacker can write to.
  • An administrator triggers a Source Control Pull.

Patches

The issue has been fixed in n8n version 1.123.43, 2.20.7, and 2.21.1. Users should upgrade to this version or later to remediate the vulnerability.

Workarounds

If upgrading is not immediately possible, administrators should consider the following temporary mitigations:

  • Disable the Source Control feature if it is not actively required.
  • Restrict write access to the connected git repository to fully trusted users only.
  • Avoid pulling from repositories that may have been modified by untrusted parties.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

Risk Scores
Base Score
9.0

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. The attacker needs the user to perform some action, like clicking a link. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.

Threat Intelligence
8.2

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
0.33%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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Critical severity
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