VulnerabilityBleeping Computer
9.8 — CRITICAL
CISA orders urgent action on actively exploited Langflow RCE flaw
The Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday ordered U.S. government agencies to prioritize patching an actively exploited vulnerability in the Langflow visual framework for building AI agents. [...]
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
The Langflow RCE flaw (CVE-2026-0770) has been actively exploited in the wild, with over 220 attempts recorded before CISA's inclusion in its KEV catalog. This critical vulnerability allows unauthenticated threat actors to gain remote code execution as root.
⚙️Technical Details
CVEs
CVE-2026-0770CVE-2025-3248CVE-2026-33017CVE-2026-55255Affected Systems: Langflow
Affected Systems
Langflow
Attack Vectors
NETWORK
💥Impact Assessment
Severity: CRITICAL
Who Is at Risk
U.S. Federal Civilian Executive Branch (FCEB) agencies and organizations operating Langflow
🛡️Recommended Actions
1Investigate historical requests to /api/v1/validate/code, review host activity, restrict access to the validation functionality, and rotate exposed credentials where successful execution cannot be ruled out.
2Apply patches for CVE-2026-0770 as soon as possible, and consider applying patches for other affected CVEs.
3Monitor system logs for suspicious activity and implement additional security controls to prevent exploitation.
📦Affected Products
Langflow LangflowLangflow
🔐NVD Verified DataVERIFIED
CVE-2026-0770 ↗CVSS 9.8 — CRITICAL
Attack Vector
NETWORK
Complexity
LOW
Vector String
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWeaknesses
CWE-829
Affected Products (CPE)
Langflow Langflow
CVE-2025-3248 ↗CVSS 9.8 — CRITICAL
Attack Vector
NETWORK
Complexity
LOW
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWeaknesses
CWE-94CWE-306
Affected Products (CPE)
Langflow Langflow
Patches & References
CVE-2026-33017 ↗CVSS 9.8 — CRITICAL
Attack Vector
NETWORK
Complexity
LOW
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWeaknesses
CWE-94CWE-306CWE-95
Affected Products (CPE)
Langflow Langflow
CVE-2026-55255 ↗CVSS 8.4 — HIGH
Attack Vector
NETWORK
Complexity
HIGH
Vector String
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:LWeaknesses
CWE-639
Affected Products (CPE)
Langflow Langflow
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