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CVE-2026-10611— OTP bypass via plugin-based LDAP authentication in MISP when LDAP mixed authentication is enabled

Quick assessment

Affected
misp misp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MISP是MISP开源的一套开源的软件解决方案。该产品用于收集、存储、分发、共享网络安全指标，并具有威胁网络安全事件分析和恶意软件分析等功能。 MISP存在安全漏洞，该漏洞源于LDAP混合认证启用OTP强制时认证绕过问题，可能导致攻击者绕过OTP步骤直接访问应用。

AI Predicted 9.1 Difficulty: Easy EPSS 0.35% · P29

Affected Version Matrix 1

VendorProduct Version RangeStatus
misp misp ≤ 2.5.38 affected
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I. Basic Information for CVE-2026-10611

Vulnerability Information
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Vulnerability Title
OTP bypass via plugin-based LDAP authentication in MISP when LDAP mixed authentication is enabled
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
MISP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MISP是MISP开源的一套开源的软件解决方案。该产品用于收集、存储、分发、共享网络安全指标，并具有威胁网络安全事件分析和恶意软件分析等功能。 MISP存在安全漏洞，该漏洞源于LDAP混合认证启用OTP强制时认证绕过问题，可能导致攻击者绕过OTP步骤直接访问应用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
misp misp 0 ~ 2.5.38 -

II. Public POCs for CVE-2026-10611

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III. Intelligence Information for CVE-2026-10611

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Patches & Fixes for CVE-2026-10611 (1)

IV. Related Vulnerabilities

Same product: misp
Same vendor: misp
Same weakness: CWE-287