CVE-2026-8859CWE-22

Path Traversal in APIRequest Component via Content-Disposition Header

Critical · published July 17, 2026

CVSS v3.1
9.9
EPSS
1%
Percentile
45.8
In the wild
Unconfirmed
What it is

IBM Langflow OSS 1.0.0 through 1.10.0 Langflow could allow an attacker to write arbitrary files to unintended locations due to improper input validation in the APIRequest component. A path traversal vulnerability exists when the "Save to File" feature is enabled, where filenames extracted from HTTP response Content-Disposition headers are not sanitized before being joined to the temporary directory path. An attacker controlling an external HTTP server can supply crafted filename values containing path traversal sequences (e.g., ../), enabling arbitrary file writes to locations accessible by the Langflow process.

The record
Technical detail
CVSS v3.1
9.9 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00560 · 45.8th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-07-17T18:58Z
EPSS history
Timeline
  • 17 JUL 18:58Z
    Path Traversal in APIRequest Component via Content-Disposition Header
    cvelistv5