SB20260423153 - Protection Mechanism Failure in n8n
Published: April 23, 2026
Security Bulletin ID
SB20260423153
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Protection Mechanism Failure (CVE-ID: N/A)
CWE-ID: CWE-693 - Protection Mechanism Failure
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to bypass default guardrail instructions.
The vulnerability exists due to improper enforcement of guardrail instructions in the Guardrail node when processing crafted workflow input. A remote attacker can craft an input to bypass default guardrail instructions.
Remediation
Install update from vendor's website.