CVE-2026-10611
CWE-287Published: June 2, 2026· Updated: Jun 22, 2026
Official Description
An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement. In deployments configured with LdapAuth.mixedAuth=true and Security.require_otp=true, users authenticated through an authentication plugin, such as LDAP, may have their authenticated session established during the application beforeFilter phase before the normal login flow enforces the OTP challenge.
As a result, an attacker with valid primary authentication credentials could bypass the required OTP step by authenticating through the plugin-backed login flow and then directly accessing another application URL instead of completing the OTP verification page. This allows access to the application as the affected user without providing a valid TOTP, HOTP, or email OTP code.
The issue affects configurations where plugin-based authentication is enabled and OTP is expected to be mandatory. The fix ensures that OTP requirements are checked immediately after plugin authentication and before the user session is established, redirecting users to the appropriate OTP challenge when required.
Risk Analysis
This critical authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement. An attacker with valid primary authentication credentials can bypass the required OTP step, gaining unauthorized access to the application as the affected user. The CVSS score of 10.0 indicates the highest possible severity, and the lack of an EPSS score means its exploitation likelihood is currently unknown.
No public exploit is currently known for this vulnerability. This flaw is remotely exploitable without user interaction, given its network attack vector and low attack complexity.
Review MISP configurations for LdapAuth.mixedAuth and Security.require_otp settings and apply any available patches. Ensure that OTP enforcement is properly integrated into the authentication flow for all login methods.
Technical Analysis
CVE-2026-10611 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 10.0.
The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.
From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (1)
Quick Facts
Related CVEs (CWE-287)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-10611 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts