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CVE-2026-5027

Langflow•HIGH · CVSS 8.8• In the wild

What is CVE-2026-5027?

The 'POST /api/v2/files' endpoint does not sanitize the 'filename' parameter from the multipart form data, allowing an attacker to write files to arbitrary locations on the filesystem using path traversal sequences ('../').

CVSS8.8 NVD 3.1
SeverityHIGH
Exploitation In the wild
EPSS<1% · P11
Triage statusActive Exploit
ActionPatch within 48 hours
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWECWE-22
NVD published2026-03-27
NVD last modified2026-03-30

Affected product

Langflow

Remediation Steps

  1. Apply the latest Langflow security patch from the vendor
  2. Review server logs for evidence of file writes to unexpected locations
  3. Validate that arbitrary files cannot be written to the application root or system directories

References

Coverage on defend.network

🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.

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