Is there a public exploit for CVE-2026-126389?

No public exploit for CVE-2026-126389 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-126389?

CVE-2026-126389 scores CVSS 6.3 (v4.0), rated medium.

What does CVE-2026-126389 affect?

CVE-2026-126389 affects n8n-io n8n. It is part of the AI and agent stack (n8n).

6.3 Medium

n8n before 1.123.89 contains an authentication bypass vulnerability in the Chat Trigger that allows unauthenticated attackers to skip n8n…

CVE-2026-126389

n8n before 1.123.89 contains an authentication bypass vulnerability in the Chat Trigger that allows unauthenticated attackers to skip n8n User Auth through the setup GET webhook route in embedded chat mode. Attackers can send unauthenticated GET requests to the chat webhook URL to read named session conversation history or trigger workflows with attacker-supplied input.

Part of the AI stack

This affects n8n, in Agent frameworks.

Assessment

CVSS: 6.3 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 13 November 2026
Last updated: 13 November 2026
Affected: n8n-io · n8n
Assigner: VulnCheck

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N

At the source

EUVD (ENISA)

References

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