CVE-2026-95754 MISP: Disabled-user check ineffective in pre-authentication TOTP login branch
Disabled users with TOTP enabled could bypass initial rejection, receiving a TOTP prompt instead of immediate denial, though final authentication still failed.
- 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-2026-95754?
CVE-2026-95754 is a medium-severity authentication bypass vulnerability in MISP, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In MISP's UsersController login() method, the pre-authentication database query used for the TOTP (two-factor authentication) verification branch did not include the User.disabled column in its SELECT fields list. The query selected only User.password, User.totp, and User.hotp_counter. When the TOTP branch subsequently accessed $unauth_user['User']['disabled'], the key was absent from the result set, producing a PHP 'Undefined array key' warning and causing the expression to evaluate as null (falsy). As a result, the disabled-user guard in the TOTP branch was effectively a no-op: a disabled, TOTP-enrolled user could proceed to the TOTP verification step rather than being rejected at that point.
The commit message explicitly states this was 'harmless in practice' because the subsequent identify() call re-validates the user and would still reject a disabled account.
The practical security impact is therefore minimal, limited to a very small information-disclosure difference in the login response (a TOTP prompt is presented instead of an immediate rejection) and a PHP warning in application logs.
Weakness: CWE-285
Which versions are affected by CVE-2026-95754?
How do I fix CVE-2026-95754?
No fix has been published for CVE-2026-95754 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-95754 being exploited?
There is no known exploitation of CVE-2026-95754 in the wild and no public exploit code.
Sources
Also known as GHSA-w52q-73m7-hm7j.