VulnerabilityBleeping Computer
9.8 — CRITICAL
CISA orders feds to prioritize patching Langflow auth bypass flaw
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) gave federal agencies until Friday to patch an actively exploited vulnerability in the Langflow visual framework for building AI agents. [...]
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has ordered federal agencies to prioritize patching a Langflow auth bypass flaw, CVE-2026-55255, which allows authenticated threat actors to access other users' flows and sensitive data.
⚙️Technical Details
CVEs
CVE-2026-55255CVE-2025-3248CVE-2026-33017CVE-2026-5027
Affected Systems
Langflow Langflow
Attack Vectors
NETWORK
💥Impact Assessment
Severity: CRITICAL
Who Is at Risk
U.S. Federal Civilian Executive Branch (FCEB) agencies
🛡️Recommended Actions
1Apply the patch for CVE-2026-55255 as soon as possible to prevent exploitation of the auth bypass flaw.
2Review and update Langflow configurations to prevent exploitation of CVE-2025-3248, CVE-2026-33017, and CVE-2026-5027.
3Monitor system logs for signs of malicious activity related to Langflow
📦Affected Products
Langflow LangflowLangflow
🔐NVD Verified DataVERIFIED
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
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-2026-5027 ↗CVSS 8.8 — HIGH
Attack Vector
NETWORK
Complexity
LOW
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeaknesses
CWE-22
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