CVE-2026-39962 LDAP injection in MISP ApacheAuthenticate when using a user-controlled Apache environment variable
Attackers can bypass authentication or execute unauthorized LDAP queries in MISP if Apache environment variables are user-controlled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-39962?
CVE-2026-39962 is a high-severity vulnerability in Misp-Project Misp, published on 9 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
MISP is an open source threat intelligence and sharing platform. Prior to 2.5.36, improper neutralization of special elements in an LDAP query in ApacheAuthenticate.php allows LDAP injection via an unsanitized username value when ApacheAuthenticate.apacheEnv is configured to use a user-controlled server variable instead of REMOTE_USER (such as in certain proxy setups). An attacker able to control that value can manipulate the LDAP search filter and potentially bypass authentication constraints or cause unauthorized LDAP queries. This vulnerability is fixed in 2.5.36.
Weakness: CWE-90
Which versions are affected by CVE-2026-39962?
It affects 1 product.
Products include Misp-Project Misp.
How do I fix CVE-2026-39962?
No fix has been published for CVE-2026-39962 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-39962 being exploited?
There is no known exploitation of CVE-2026-39962 in the wild and no public exploit code.
Other vulnerabilities in Misp-Project Misp
Sources
Also known as GHSA-mc53-48w8-9g63.