CVE-2025-3248

CRITICAL9.8Published on April 7, 2025

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.

Actively exploited

In the CISA exploited-vulnerabilities catalogue since May 5, 2025
US federal agencies must remediate it by May 26, 2025 (BOD 22-01)
First attack observed 4 days after disclosure
Confirmed by sensors, not only by reports
Used in ransomware campaigns

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Source: CISA KEV · Sep 1, 2026 Aug 31, 2026 Aug 31, 2026 Aug 30, 2026 Aug 30, 2026 Aug 29, 2026

CVSS score9.8 / 10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness type (CWE)CWE-306, CWE-94, CWE-306

Vendorslangflow