CVE-2026-90895 MISP Interactive CLI Shell: Authorization Bypass, Credential Exposure, and Terminal Injection
Attackers can bypass CLI authorization checks to view restricted feeds, sharing groups, and exposed credentials in MISP.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90895?
CVE-2026-90895 is a high-severity missing authorization vulnerability in MISP, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Affected versions of MISP’s interactive CLI shell implement access control independently from the normal web application, causing several authorization inconsistencies.
The patch shows that CLI access could differ from the web application in multiple security-sensitive areas:
- feed listings did not enforce the same lookup_visible restrictions for non-host-organisation users; - feed detail access did not enforce the same host-organisation/site-admin authorization as FeedsController::view(); - Feed.headers, which can contain HTTP authorization credentials, could be exposed instead of being hidden or masked; - server synchronization authkey values were not explicitly hidden from CLI detail output; - sharing-group detail access did not consistently use SharingGroup::checkIfAuthorised(); - the use command could establish context for a record without first proving that the user was authorized to view that record
The commit additionally hardens pagination and terminal rendering, including neutralization of terminal control sequences found in database-backed values. Those are important hardening changes, but the main vulnerability is the CLI authorization/data-disclosure mismatch.
Version affected: ≤2.5.45
Which versions are affected by CVE-2026-90895?
How do I fix CVE-2026-90895?
No fix has been published for CVE-2026-90895 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-2026-90895 being exploited?
There is no known exploitation of CVE-2026-90895 in the wild and no public exploit code.
Sources
Also known as GHSA-rx79-g748-j44m.