CVE-2026-94393 MISP Event Report Cross-Event Reparenting via Unscoped UUID Resolution in editReport
Attackers with editor access can move reports between events by guessing UUIDs, exposing or modifying private data across event boundaries.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-94393?
CVE-2026-94393 is a medium-severity missing authorization vulnerability in MISP, published on 21 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
When a user creates or edits a report inside an event, MISP can identify an existing report using its UUID without properly checking whether that report actually belongs to the same event.
As a result, a user who has editing rights on one event could potentially move a report from another event into their own event, as long as they know or can guess the report’s UUID. Once moved, they could view and change information that they were not originally allowed to access.
The vulnerability requires the attacker to have editor access to at least one event and to know or discover a valid report UUID.
The main impact is that private event reports could be exposed or modified across event boundaries, bypassing MISP’s normal access restrictions.
Version affected: <2.5.47
Which versions are affected by CVE-2026-94393?
How do I fix CVE-2026-94393?
No fix has been published for CVE-2026-94393 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-2026-94393 being exploited?
There is no known exploitation of CVE-2026-94393 in the wild and no public exploit code.
Sources
Also known as GHSA-rq8q-gvp5-cmqp.