CVE-2026-71268

Published: Aug 5, 2026Modified: Oct 24, 2026Deferred

9.9

Vector

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

Exploitability: 3.1 / Impact: 6.0

Source: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (Secondary)

Description

OpenPLC Runtime v3's compile_program function (webserver/openplc.py) parses directives from uploaded Structured Text (.st) program files and writes the referenced content to with no validation that file_path stays within the ./core directory. A path-validation function, validate_file_path, exists elsewhere in the codebase (webserver/credentials.py) but is never invoked from compile_program, leaving the sink unprotected.

Related CWEs

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (2)

https://github.com/thiagoralves/OpenPLC_v3

Source: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

https://github.com/thiagoralves/OpenPLC_v3/blob/master/webserver/openplc.py

Source: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

Timeline

No history available yet.