CVE-2026-39962CRITICAL 9.6EPSS p26.2%

CVE-2026-39962CVE-2026-39962

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.

Scoring

CVSS 3.19.6 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS0.34% probability of exploitation · percentile 26.2% · 2026-06-18T12:00:27Z
Published2026-04-09
Last modified2026-04-23

Underlying weaknesses· 1

CWE-90

References

  1. https://github.com/MISP/MISP/commit/380ee4136a7d9ce2fe63fce06d517839f30aba10
  2. https://github.com/MISP/MISP/commit/d7d671ea8f5822e91207dcad2003c35c30092a32
  3. https://github.com/MISP/MISP/releases/tag/v2.5.36
  4. https://github.com/MISP/MISP/security/advisories/GHSA-mc53-48w8-9g63

1

TypeTargetConfidenceTier
WeaknessImproper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')cwe-900%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.