CVE-2026-71854 OpenAEV has unauthenticated access and missing object-level authorization on player lessons API
Unauthenticated attackers can read and modify lesson answers in OpenAEV by exploiting missing authorization checks on player API endpoints.
- 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-2026-71854?
CVE-2026-71854 is a high-severity missing authorization vulnerability in OpenAEV-Platform openaev, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenAEV is an open source platform allowing organizations to plan, schedule and conduct cyber adversary simulation campaign and tests. Prior to version 2.260622.0, on a default installation, the `/api/player/**` lessons endpoints can be called without authentication, and they trust a client-supplied `userId` query parameter without verifying that the caller is that user or a member of the exercise. An unauthenticated client that knows an exercise UUID can read lessons-learned questions and answers (including each answer's author identity) and create or overwrite answers attributed to an arbitrary user. Version 2.260622.0 contains a patch.
Which versions are affected by CVE-2026-71854?
How do I fix CVE-2026-71854?
No fix has been published for CVE-2026-71854 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-2026-71854 being exploited?
There is no known exploitation of CVE-2026-71854 in the wild and no public exploit code.
Sources
Also known as GHSA-47wr-wp4h-8v3f.