Langflow · Langflow
CVE-2025-3248
Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code
What it is
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.
CISA: Langflow contains a missing authentication vulnerability in the /api/v1/validate/code endpoint that allows a remote, unauthenticated attacker to execute arbitrary code via crafted HTTP requests.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Deadline for US federal agencies: May 26, 2025
- Added to the CISA list
- May 5, 2025
- Published
- April 7, 2025
- Severity
- Critical 9.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- >99.9% in the top 0.1% of all known vulnerabilities
- Weakness
- CWE-306
- More details
- NVD · CVE.org · CISA
All references (4)
More exploited flaws from Langflow
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Jul 21, 2026 | Inclusion of Functionality from Untrusted Control Sphere | Langflow | Critical 9.8 | 63% |
| Jul 7, 2026 | Authorization Bypass Through User-Controlled Key | Langflow | High 8.4 | 0.9% |
| May 21, 2026 | Origin Validation Error | Langflow | Critical 9.4 | 93% |
| Mar 25, 2026 | Code Injection | Langflow | Critical 9.3 | 96% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.