Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Autonomy Logic | OpenPLC Runtime | — | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
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Eyodav/CVE-2025-34226 ★ 0 · Sep 23, 2025
OpenPLC Runtime suffers from a persistent denial of service (DoS) vulnerability in the /upload-program-action endpoint.
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://autonomylogic.com/ product
- https://openplc.discussion.community/post/persistant-dos-affecting-openplc-runtime-13722844 issue-tracking
- https://github.com/thiagoralves/OpenPLC_v3/pull/297/commits/095ee09623dd229b64ad3a1db38a901a3772f6fc issue-tracking patch
- https://www.vulncheck.com/advisories/openplc-runtime-v3-persistent-denial-of-service third-party-advisory