CVE-2026-95805 MISP ACLComponent: Typo in previewEventAttributes ACL key bypasses intended access restriction
A typo in MISP's ACL configuration allows unauthorized users to access sensitive event attribute data via the previewEventAttributes endpoint.
- 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-2026-95805?
CVE-2026-95805 is a medium-severity missing authorization vulnerability in MISP, published on 22 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A typo in the MISP ACLComponent access control configuration caused the ACL rule for the previewEventAttributes action to reference the permission string 'theming_enabled*' (with a trailing asterisk) instead of the correct 'theming_enabled'. In the MISP ACL system, the array values define which role or permission grants access to a given controller action. The adjacent entry previewEventObjects correctly uses ['theming_enabled'], confirming the intended restriction. The malformed key 'theming_enabled*' does not match any valid permission identifier, causing the access control check for previewEventAttributes to malfunction. Depending on the ACL evaluation logic, this could result in either unauthorized users gaining access to the previewEventAttributes endpoint (authorization bypass) or legitimate users being denied access (availability impact).
The previewEventAttributes endpoint exposes event attribute data within MISP so an authorization bypass could expose sensitive indicator and attribute data to users who should not have access.
Weakness: CWE-285
Which versions are affected by CVE-2026-95805?
How do I fix CVE-2026-95805?
No fix has been published for CVE-2026-95805 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-2026-95805 being exploited?
There is no known exploitation of CVE-2026-95805 in the wild and no public exploit code.
Sources
Also known as GHSA-c2r5-m9w2-228q.