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CVE-2025-3248

CRITICAL9.8
CISA KEV

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

CWE-306CWE-94CWE-306

CISA Known-Exploited Vulnerability

Product: Langflow — Langflow

Name: Langflow Missing Authentication Vulnerability

Date added: 2025-05-05 · Due: 2025-05-26

USED IN RANSOMWARE

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.

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