CVE-2026-5027

high · 8.8

A public exploit / detection template exists

Weaponised detection is publicly available, which meaningfully raises real-world risk regardless of CVSS. nuclei-templates →

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 ('../').

8.8

CVSS

36.1%

EPSS (exploit prob.)

98th

EPSS percentile

2026-03-27

Published

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-22

Affected products

Vendor	Product	Affected versions
langflow	langflow	< 1.9.0

Check a specific version with /api/v1/cve/match.

References

https://www.tenable.com/security/research/tra-2026-26

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-5027