CVE-2026-20748 Everon api.everon.io Insufficient Session Expiration
Attackers can hijack sessions or cause denial of service by exploiting predictable WebSocket session identifiers in the Everon charging API.
- 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-2026-20748?
CVE-2026-20748 is a medium-severity authentication bypass vulnerability in api.everon.io, published on 6 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The WebSocket backend uses charging station identifiers to uniquely associate sessions but allows multiple endpoints to connect using the same session identifier. This implementation results in predictable session identifiers and enables session hijacking or shadowing, where the most recent connection displaces the legitimate charging station and receives backend commands intended for that station. This vulnerability may allow unauthorized users to authenticate as other users or enable a malicious actor to cause a denial-of-service condition by overwhelming the backend with valid session requests.
Weakness: CWE-613
Which versions are affected by CVE-2026-20748?
It affects 1 product.
Products include Everon Api.everon.io.
How do I fix CVE-2026-20748?
No fix has been published for CVE-2026-20748 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-20748 being exploited?
There is no known exploitation of CVE-2026-20748 in the wild and no public exploit code.
Other vulnerabilities in api.everon.io
Sources
Also known as GHSA-35c6-2wx7-593f.