CVE-2026-94381 MISP Privilege Escalation: Read-Only API Key User Can Regain Full Role via updateLoginTime
Attackers with read-only API keys can regain full account permissions via updateLoginTime, bypassing API restrictions to perform unauthorized actions.
- 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-2026-94381?
CVE-2026-94381 is a high-severity 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
MISP has a security issue that can let a user gain more access than their API key is supposed to allow.
A read-only API key should only let someone view information. However, after logging in with such a key, a specific MISP function could accidentally restore the user’s normal account permissions. This means someone with a read-only API key could potentially gain write, delete, or even administrator access if their underlying account has those permissions.
Exploiting the issue requires a valid read-only API key and a single request to the affected function.
The main impact is that MISP’s API key restrictions can be bypassed, allowing actions that the API key was specifically meant to prevent.
Version affected: <2.5.47
Weakness: CWE-269
Which versions are affected by CVE-2026-94381?
How do I fix CVE-2026-94381?
No fix has been published for CVE-2026-94381 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-94381 being exploited?
There is no known exploitation of CVE-2026-94381 in the wild and no public exploit code.
Sources
Also known as GHSA-mw89-3hh7-vfpg.