Risk Letters

Exploited vulnerability

CVE-2025-3248

TLP:CLEAR

Langflow Missing Authentication Vulnerability

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.

Facts

  • Vendor: Langflow
  • Product: Langflow
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 100 %
  • On CISA's Known Exploited Vulnerabilities list since: 5 May 2025
  • First known exploitation: 5 May 2025
  • Used in ransomware campaigns (per CISA): Yes
  • CISA's deadline for US federal agencies: 26 May 2025
  • Weakness: CWE-306
  • First seen by Risk Letters: 5 May 2025

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD