---
id: CVE-2026-39962
title: MISP is an open source threat intelligence and sharing platform
summary: >-
  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 ApacheA…
severity: critical
cvss: 9.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'
cwe:
  - CWE-90
published: '2026-04-09'
updated: '2026-06-22'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-39962'
references:
  - url: >-
      https://github.com/MISP/MISP/commit/380ee4136a7d9ce2fe63fce06d517839f30aba10
    label: security-advisories@github.com
  - url: >-
      https://github.com/MISP/MISP/commit/d7d671ea8f5822e91207dcad2003c35c30092a32
    label: security-advisories@github.com
  - url: 'https://github.com/MISP/MISP/releases/tag/v2.5.36'
    label: security-advisories@github.com
  - url: 'https://github.com/MISP/MISP/security/advisories/GHSA-mc53-48w8-9g63'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00655
epssPercentile: 0.49228
ingestedAt: '2026-06-29T13:24:34.825Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.