Langflow MCP stdio RCE exploited in the wild, fix in 1.9.0
CVE-2026-105740 (CVSS 9.9) lets any authenticated Langflow user run OS commands via an MCP stdio server config; Previdian honeypots logged 1,423 exploit attempts since September 19.
Stories tagged: #langflow
Langflow CVE-2026-55255 IDOR added to CISA KEV, patch to 1.9.2
CISA added the Langflow /api/v1/responses IDOR (CVE-2026-55255, CVSS 9.9) to KEV on July 7. Sysdig first observed exploitation on June 25. Third Langflow flaw to hit KEV in seven months.
Langflow CVE-2026-5027 exploited; fix shipped but unlabelled
VulnCheck added CVE-2026-5027 to its KEV on June 8 after detecting in-the-wild exploitation. Path traversal in /api/v2/files yields unauth RCE; ~7,000 instances are publicly exposed.
CISA flags Langflow CVE-2025-34291: CORS chain yields RCE
CISA added CVE-2025-34291 to the KEV catalog on May 21. An overly permissive CORS plus a misconfigured refresh-token cookie chain to account takeover and code execution in Langflow ≤ 1.6.9.