Attackers Exploit Critical Langflow and Ruby on Rails Flaws for Credential Theft and C2 Infrastructure
Active exploitation has been confirmed for CVE-2026-0768 in Langflow and CVE-2026-66066 in Ruby on Rails. Attackers first focus on reconnaissance and secret exfiltration before establishing command-and-control channels, with potential escalation to remote code execution. In Langflow the flaw allows arbitrary Python code execution as root due to insufficient input validation, enabling attackers to dump environment variables and locate cloud credentials. The Ruby on Rails issue, tracked as KindaRails2Shell, stems from an arbitrary file read triggered when Active Storage processes untrusted image uploads with libvips, exposing secret_key_base and other sensitive keys. Observed campaigns show traffic originating from Russia against Langflow instances and activity targeting canaries in Singapore, Israel, and the United Kingdom for Rails deployments. Defenders are advised to inventory public instances, apply the latest patches, rotate exposed secrets, and monitor for suspicious file reads and C2 communications.
HispasecSep 1, 2026Translated from Spanish
