All vulnerabilities
CVE-2025-3248

Langflow Missing Authentication Vulnerability

Langflow LangflowApplications & CMS
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationExploited in the wildAdded to KEV 5 May 2025. Known ransomware useCISA KEV
Exploit odds (EPSS)>99.9%Chance of exploitation activity in the next 30 days, higher than 99.9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1.3.0Fixed versionCVE List
Federal deadline26 May 2025Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 7 Apr 2025, 14:22 UTCPublishedCVE List
  2. 9 Apr 2025Exploit code publicMetasploit
  3. 5 May 2025Added to CISA KEVCISA KEV
  4. 30 Sep 2026, 14:00 UTCFirst reported exploitedGoogle Threat Intelligence

Public exploit code and templates 4

  • Exploit moduleLangflow AI RCE 9 Apr 2025Metasploit
  • Webapps exploitLangflow 1.2.x - Remote Code Execution (RCE) 16 Jul 2025Exploit-DB
  • Remote exploitLangflow 1.3.0 - Remote Code Execution (RCE) 18 Apr 2025Exploit-DB
  • Scanner templateLangflow AI - Unauthenticated Remote Code ExecutionNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

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.

Text from CVE List

Affected versions 1

  • langflowaffected: all versions before 1.3.0CVE List

References 6