CVE-2026-71268: critical vulnerability in thiagoralves OpenPLC_v3
OpenPLC Runtime v3 Path Traversal in Structured Text FILE Directive Leading to Arbitrary File Write
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.9epss 0.6%
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:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
thiagoralves · OpenPLC_v3Related CVEs — thiagoralves OpenPLC_v3
In the same product, most dangerous first.