CVE-2025-59398 Denial of service in libocpp
An attacker can crash the EVerest application by sending JSON input exceeding 255 characters to the libocpp library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-59398?
CVE-2025-59398 is a low-severity denial of service vulnerability in EVerest libocpp, published on 15 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The OCPP implementation in libocpp before 0.26.2 allows a denial of service (EVerest crash) via JSON input larger than 255 characters, because a CiString<255> object is created with StringTooLarge set to Throw.
Weakness: CWE-392
Which versions are affected by CVE-2025-59398?
How do I fix CVE-2025-59398?
No fix has been published for CVE-2025-59398 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-59398 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-59398 exists.
Sources
Also known as GHSA-9j3x-w929-5ch3.