OpenPLC Runtime v3 Path Traversal in Structured Text FILE Directive Leading to Arbitrary File Write
Priority MEDIUM 44CWE-22Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0058 47th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| thiagoralves | OpenPLC_v3 | all versions | — | No fix listed | CNA |
- OpenPLC_v3 Vendorthiagoralves Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-71268
- 2026-10-03 Alias added: GHSA-qprq-675r-82h6
References
More thiagoralves vulnerabilities
- TI-2025-34678 Unrestricted file upload in thiagoralves OpenPLC_v3 CVSS 3.1MEDIUM 6.4
Sources
- CVE-2026-71268 · CVE Program
- CVE-2026-71268 · NVD
- FIRST EPSS
- GHSA-qprq-675r-82h6 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences