CVE-2026-20781 CloudCharge cloudcharge.se Missing Authentication for Critical Function

Critical 9.3 Published 26 Feb 2026 Updated 5 Mar 2026

Unauthenticated attackers can impersonate charging stations via WebSocket endpoints to manipulate data and control infrastructure.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-20781?

CVE-2026-20781 is a critical missing authorization vulnerability in cloudcharge.se, published on 26 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

WebSocket endpoints lack proper authentication mechanisms, enabling attackers to perform unauthorized station impersonation and manipulate data sent to the backend. An unauthenticated attacker can connect to the OCPP WebSocket endpoint using a known or discovered charging station identifier, then issue or receive OCPP commands as a legitimate charger. Given that no authentication is required, this can lead to privilege escalation, unauthorized control of charging infrastructure, and corruption of charging network data reported to the backend.

Weakness: CWE-306

Which versions are affected by CVE-2026-20781?

It affects 1 product.

Products include Cloudcharge Cloudcharge.se.

How do I fix CVE-2026-20781?

No fix has been published for CVE-2026-20781 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-20781 being exploited?

There is no known exploitation of CVE-2026-20781 in the wild and no public exploit code.

Sources

Also known as GHSA-926q-p427-pgcj.