Vulnerabilities/Langflow/CVE-2025-3248

CVE-2025-3248: Langflow Missing Authentication Vulnerability

CISA KEV entry · Last checked 30 Oct 2026, 12:10 UTC

Exploitation confirmedRansomware use knownFix: Unknown

CVSS 3.1 · NVD9.8Critical
EPSS100.0%100th percentile · 29 Oct 2026
CISA KEVListedAdded 5 May 2025

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.

Recommended 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.

CISA due date 26 May 2025 · CWE-306

Vendor advisory ↗CISA KEV entry ↗

Am I affected?

ProductAffected versionsFixed in
langflowbefore 1.3.0Unknown

No source states a fixed version. Check the vendor advisory below.

Before you patch

Restart

See vendor guidance.

Known issues

Check release notes.

Verification

Confirm installed version.

Timeline

  • 5 May 2025 · Added to CISA KEV
  • 26 May 2025 · CISA due date

References

Sources checked
CISA KEV30 Oct 2026, 12:10 UTC
CVE List v530 Oct 2026, 12:11 UTC
NVD30 Oct 2026, 12:10 UTC
FIRST EPSS30 Oct 2026, 12:11 UTC

Data from CISA, MITRE, NVD and FIRST. Sources and licences.