What is CVE-2026-31156?

CVE-2026-31156 is a medium-severity vulnerability in Openplcproject Openplc_v3, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-05-13.

How severe is CVE-2026-31156?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2026-31156 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Path Traversal in Openplcproject Openplc_v3

CVE-2026-31156

A path injection vulnerability exists in OpenPLC v3 (2c82b0e79c53f8c1f1458eee15fec173400d6e1a) as the binary program compiled from glue_generator.cpp does not perform any validation on the file path parameters passed via the command line…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.000 (13.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Openplcproject Openplc_v3
Openplcproject Openplc_v3_firmware — versions 2024-03-09
N/a — versions n/a

Weakness classification (CWE)

CWE-22 — Path Traversal

Public proof-of-concept exploits

unicorn-hyh/CVE-2026-31156

References

cve@mitre.org (Product)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2026-31156?: CVE-2026-31156 is a medium-severity vulnerability in Openplcproject Openplc_v3, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-05-13.
How severe is CVE-2026-31156?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2026-31156 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.