CVE-2025-3248
Langflow Missing Authentication Vulnerability
CVSS
9.8
Critical
EPSS
100.0%
p100
KEV
YES
May 5, 2025
Exploit Today
80
0-100
Published: Apr 7, 2025 · Last modified: Jul 14, 2026 · CWE-306 · CWE-94
Product
Langflow / Langflow
Vulnerability
Langflow Missing Authentication Vulnerability
Added to KEV
May 5, 2025
Remediate by
May 26, 2025
Known ransomware use
Yes
Summary 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.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
This vulnerability affects a common open-source project, third-party library, or a protocol used by different products. For more information, please see: https://github.com/advisories/GHSA-c995-4fw3-j39m ; https://nvd.nist.gov/vuln/detail/CVE-2025-3248
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.
- github.comhttps://github.com/langflow-ai/langflow/pull/6911
- github.comhttps://github.com/langflow-ai/langflow/releases/tag/1.3.0
- www.horizon3.aihttps://www.horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-python-exec-for-unauth-rce-in-langflow-ai/
- www.vulncheck.comhttps://www.vulncheck.com/advisories/langflow-unauthenticated-rce
- www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-3248