SB2026020671 - Multiple vulnerabilities in n8n

Description

This security bulletin contains information about 2 vulnerabilities.

1) OS Command Injection (CVE-ID: CVE-2026-25053)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation in Git Node. A remote user can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Improper Certificate Validation (CVE-ID: CVE-2026-33724)

CWE-ID: CWE-295 - Improper Certificate Validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to disclose sensitive information and modify workflow content.

The vulnerability exists due to improper certificate validation in the SSH command used for git operations when connecting to a remote Git server over SSH for Source Control operations. A remote attacker can present a fraudulent host key in a machine-in-the-middle position to disclose sensitive information and modify workflow content.

Only instances with the Source Control feature explicitly enabled and configured to use SSH are vulnerable.

Remediation

Install update from vendor's website.

References

• https://github.com/n8n-io/n8n/security/advisories/GHSA-9g95-qf3f-ggrw
• https://github.com/n8n-io/n8n/security/advisories/GHSA-43v7-fp2v-68f6
• https://github.com/advisories/GHSA-43v7-fp2v-68f6