HTTP: n8n Ni8mare Content-Type Confusion Multipart Form Bypass

This signature detects attempts to exploit a known vulnerability against n8n. A successful attack can lead to sensitive information disclosure.

References

CVE: CVE-2026-21858

Short Name
HTTP:CTS:N8N-NI8MARE-TYPE
Severity
Major
Recommended
False
Recommended Action
Drop
Category
HTTP
Keywords
Bypass CVE-2026-21858 Confusion Content-Type Form Multipart Ni8mare n8n
Release Date
01/27/2026
Supported Platforms

mx-19.3

vmx-19.3

vsrx-19.2

srx-19.3

srx-branch-19.3

vsrx3bsd-19.2

srx-19.4

vsrx3bsd-19.4

srx-branch-19.4

vsrx-19.4

vmx-19.4

mx-19.4

srxevo-25.4

vsrx-26.2

srx-26.2

srx-branch-26.2

vsrx3bsd-26.2

mx-12.3

srx-12.3

srx-branch-12.3

vsrx-12.3

Sigpack Version
3883
False Positive
Unknown

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