Langflow Missing Authentication Vulnerability
langflow-ai — 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.
9.8
100.0%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- Apr 7, 2025
- Modified
- Jul 14, 2026
- Added to KEV
- May 5, 2025
- Federal patch due
- May 26, 2025
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2025-3248, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2025-3248 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is 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.
How severe is CVE-2025-3248?
CVE-2025-3248 has a CVSS base score of 9.8 out of 10 (CVSS 3.1).
Is CVE-2025-3248 actively exploited in the wild?
Yes. CVE-2025-3248 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added May 5, 2025, meaning CISA has confirmed evidence of active exploitation. It is also flagged as used in ransomware campaigns.
What is the EPSS score for CVE-2025-3248?
100.0% - meaning FIRST.org's EPSS model estimates a 100.0% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2025-3248?
Yes - a public Nuclei template referencing CVE-2025-3248 exist in public repositories we checked.
What type of vulnerability is CVE-2025-3248?
CVE-2025-3248 is classified under CWE-306 (CWE-306 Missing Authentication for Critical Function).
Cross-checked against
Impactr finds and proves whether CVE-2025-3248 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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