CVE-2025-3248
Langflow Missing Authentication Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 26 May 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 99.99% probability · 100th percentile
- CISA KEV
- Listed 5 May 2025 · due 26 May 2025 · used in ransomware campaigns
- Weakness
- CWE-306, CWE-94
- Affected
- langflow/langflow
- Source
- disclosure@vulncheck.com
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. This vulnerability affects a common open-source project, third-party library, or a protocol used by different products. For more information, please see: https://github.com/advisories/GHSA-c995-4fw3-j39m ; https://nvd.nist.gov/vuln/detail/CVE-2025-3248
References
- https://github.com/langflow-ai/langflow/pull/6911Patch
- 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, Third Party Advisory
- https://www.vulncheck.com/advisories/langflow-unauthenticated-rceThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-3248US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.