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.

Score

CVSS 3.1 9.8 Critical

Status

Analyzed - disclosure@vulncheck.com

Published

2025-04-07

Last modified

2026-10-08

Known exploited (CISA KEV)

since 2025-05-05, action due 2025-05-26: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Weaknesses

CWE-306, CWE-94

Affected products

• Langflow (Langflow)

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-…
• https://www.vulncheck.com/advisories/langflow-unauthenticated-rce
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-3248