CVE-2026-31156
CVE-2026-31156 is a medium-severity vulnerability in Openplcproject Openplc V3 Firmware with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.
Key facts
- Severity: Medium (CVSS 3.x base score 6.5)
- EPSS exploit prediction: 0% (31st percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-29960
- Weakness: CWE-22
- Affected product: Openplcproject Openplc V3 Firmware
- Published:
- Last modified:
Description
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. The user-controlled input parameters are directly passed to the underlying file operation functions (fopen/ifstream/ofstream) for file reading and writing. An attacker can exploit this vulnerability by constructing a malicious path to read arbitrary readable files.
Frequently asked questions
- What is 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. The user-controlled input parameters are directly passed to the underlying file operation functions (fopen/ifstream/ofstream) for file reading and writing. An attacker can exploit this vulnerability by constructing a malicious path to read arbitrary readable files.
- How severe is CVE-2026-31156?
- CVE-2026-31156 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2026-31156 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-31156?
- CVE-2026-31156 affects Openplcproject Openplc V3 Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-31156?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-31156 have an EU (EUVD) identifier?
- Yes. CVE-2026-31156 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29960.
- When was CVE-2026-31156 published?
- CVE-2026-31156 was published on 2026-05-13 and last updated on 2026-07-05.
References
EU advisories (EUVD)
Affected products (1)
- cpe:2.3:o:openplcproject:openplc_v3_firmware:2024-03-09:*:*:*:*:*:*:*
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