Langflow Missing Authentication Vulnerability (CVE-2025-3248)
Severity: critical · Patch status: patched · Since 2025-05-05 · CVE-2025-3248
Langflow contains a missing authentication vulnerability in the /api/v1/validate/code endpoint that allows a remote, unauthenticated attacker to execute arbitrary code via crafted HTTP requests. CISA added CVE-2025-3248 to its Known Exploited Vulnerabilities catalog on May 5, 2025, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by May 26, 2025 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
