Malicious Langflow Exploitation Marker File Creation

ATT&CK techniques

Initial Access

Recon
Resource Dev
Initial Access
- T1190Exploit Public-Facing Application
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects creation of the lang_pwn marker file that the Langflow CVE-2026-55255 exploitation chain drops to confirm successful code execution. The file acts as a proof-of-exploitation beacon left in the temp directory. Its presence is a high-confidence indicator that the host was compromised through the Langflow vulnerability.

Reporting behind it

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Malicious Langflow Exploitation Marker File Creation

Pivot detection · T1190 · 9 related

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