CVE-2025-34226

OpenPLC Runtime v3 Persistent DoS

7.1 HighPublic exploit

OpenPLC Runtime v3 contains an input validation flaw in the /upload-program-action endpoint: the epoch_time field supplied during program uploads is not validated and can be crafted to induce corruption of the programs database. After a successful malformed upload the runtime continues to operate until a restart; on restart the runtime can fail to start because of corrupted database entries, resulting in persistent denial of service requiring complete rebase of the product to recover. This vulnerability was remediated by commit 095ee09.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: High

Exploit likelihood

0.68%Up 0.6 points since Oct 4, 2025

What each source reports

CVE List Score used 7.1

OpenPLC Runtime v3 Persistent DoS

Record: CVE-2025-34226
CVSS 4.0: 7.1 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
Weakness: CWE-664, CWE-20
Updated: 2026-11-08

EUVDEUVD-2025-32488 7.1

Record: EUVD-2025-32488
CVSS 4.0: 7.1 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-08

GitHub AdvisoriesGHSA-qjpv-g9fx-fc98 7.1

OpenPLC Runtime v3 contains an input validation flaw in the /upload-program-action endpoint: the...

Record: GHSA-qjpv-g9fx-fc98
CVSS 4.0: 7.1 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness: CWE-20
Updated: 2026-11-02

NVD 7.1

Record: CVE-2025-34226
CVSS 4.0: 7.1 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness: CWE-20, CWE-664
Updated: 2026-11-02

Affected products

autonomy logic openplc runtime

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	Eyodav/CVE-2025-34226	2025-09-23

History

History
Recorded	Changed	Sources
Nov 8, 2026	facts, references	CVE List
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-34226 is a high vulnerability (CVSS 7.1) in Autonomy Logic Openplc Runtime, published October 3, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.68%, the 52nd percentile. No source names a fixed version.