Critical 9.8Known exploited (CISA KEV)Published Apr 7, 2025

CVE-2025-3248Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code

Updated under an hour ago (2026-10-19 06:10 UTC)

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It affects langflow-ai langflow and 1 other product. Add what you run to find out whether that includes you.

CISA lists it as known exploited since May 5, 2025; federal agencies had to remediate by May 26, 2025, and it is known to be used in ransomware. Treat that date as your deadline.

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Every CVE for langflow-ai langflow

Exploited in the last 30 days

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 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-306
Known exploited: Added to CISA KEV May 5, 2025; federal remediation due May 26, 2025; known ransomware useApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 99.99% (percentile 100)
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Oct 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

langflow-ai langflow langflow_ai:langflow (from the name)	before 1.3.0	CNA record
langflow langflow langflow:langflow	before 1.3.0	NVD

References

https://github.com/langflow-ai/langflow/pull/6911issue-tracking
https://github.com/langflow-ai/langflow/releases/tag/1.3.0release-notes
https://www.horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-python-exec-for-unauth-rce-in-langflow-ai/exploit
https://www.vulncheck.com/advisories/langflow-unauthenticated-rcethird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.