CVE-2025-3248

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.

Scoring

• CVSS: 9.8 (CRITICAL, 3.1)
• EPSS exploitation probability: Not yet available
• EPSS percentile: Not yet available

CISA KEV status

• Added to KEV: 2025-05-05
• Remediation due date: 2025-05-26
• Known ransomware campaign use: Known

Weakness types (CWE)

• CWE-306
• CWE-94
• CWE-306

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

More from Langflow

• CVE-2026-0770 — Langflow
• CVE-2026-55255 — Langflow
• CVE-2025-34291 — Langflow
• CVE-2026-33017 — Langflow