CVE-2025-3248
critical CISA KEVLangflow Missing Authentication Vulnerability
Vendor / product: Langflow — Langflow
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
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2025-04-07 15:15
Modified: 2026-10-08 16:16
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 07:07 UTC
Exploitation
Listed in CISA KEV
Added 2025-05-05 · due 2025-05-26
Known ransomware use: Known
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected products
langflow / langflow <1.3.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/langflow-ai/langflow/pull/6911
References
- https://github.com/langflow-ai/langflow/pull/6911 disclosure@vulncheck.com
- https://github.com/langflow-ai/langflow/releases/tag/1.3.0 disclosure@vulncheck.com
- https://www.horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-python-exe... disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/langflow-unauthenticated-rce disclosure@vulncheck.com
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-3248 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
CISA KEV — fetched 2026-10-27 06:50 UTC · record ↗
NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗