Langflow Missing Authentication Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2025-05-05
• Known to be used in ransomware campaigns
• EPSS: 100% chance of exploitation in the next 30 days (higher than 100% of CVEs)
• Critical severity: CVSS 9.8

[ Description ]Official description

Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code.

CISA: 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.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 26 May 2025): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• github.com/langflow-ai/langflow/pull/6911Patch
• github.com/langflow-ai/langflow/releases/tag/1.3.0Release Notes
• www.horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-python-exec-for…ExploitThird Party Advisory
• www.vulncheck.com/advisories/langflow-unauthenticated-rceThird Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource