CVE-2026-71268

9.9 CRITICALpublic exploit available

Published 2026-08-05 · Updated 2026-08-10

AI risk analysis

Summary: The flaw allows attackers to execute arbitrary code by manipulating file paths in uploaded Structured Text files, due to lack of proper validation.
Exploitability: Exploitation is relatively easy as it requires uploading a specially crafted .st file without invoking the path-validation function.
Blast radius: If exploited, this could lead to full control over the system hosting the OpenPLC Runtime v3 webserver.
Prioritized remediation: Ensure the validate_file_path function is called from compile_program to prevent code execution via malicious file paths.

rcecode-executionwebruntime

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

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

Weaknesses

CWE-22

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.