CVE-2025-3248
Published 2025-04-07 · Updated 2026-10-08 · Source disclosure@vulncheck.com
Summary
CVE-2025-3248 is a critical-severity (CVSS 9.8) vulnerability in Langflow Langflow. CISA added it to the Known Exploited Vulnerabilities catalog on May 5, 2025, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 26, 2025. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Langflow has 5 vulnerabilities in the KEV catalog, 1 of them linked to ransomware.
All 5 known-exploited Langflow vulnerabilities →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.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Langflow — Langflow
Name: Langflow Missing Authentication Vulnerability
Date added: 2025-05-05 · Due: 2025-05-26
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.
References
- https://github.com/langflow-ai/langflow/pull/6911
- https://github.com/langflow-ai/langflow/releases/tag/1.3.0
- https://www.horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-python-exec-for-unauth-rce-in-langflow-ai/
- https://www.vulncheck.com/advisories/langflow-unauthenticated-rce
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-3248