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1. 95Immediate CVE-2025-3248 ExigentCISA KEVActively Exploited Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. CVSS v3.1 9.8

   Severity CRITICAL CVSS v3.1 9.8 EPSS 99+

   Out-of-Band / Urgent Remediation

   Listed in the CISA KEV catalog, and an EPSS probability of 0.999.

   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.

   Vulnerability type: CWE-306 | CWE-94 — Code injection

   Impacted software or hardware

   • langflow Software — < 1.3.0

   Patch status: Patch or fixed version identified

   Fixed versions: langflow: update to 1.3.0 or later

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

   Remediation basis: CISA KEV required action

   CISA KEV: known exploited. Remediation due 2025-05-26. Known ransomware campaign use: Known.

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