CVE-2026-39962

high

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.

References

https://github.com/MISP/MISP/security/advisories/GHSA-mc53-48w8-9g63

https://github.com/MISP/MISP/releases/tag/v2.5.36

https://github.com/MISP/MISP/commit/d7d671ea8f5822e91207dcad2003c35c30092a32

https://github.com/MISP/MISP/commit/380ee4136a7d9ce2fe63fce06d517839f30aba10

Details

Source: Mitre, NVD

Published: 2026-04-09

Updated: 2026-04-13

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

CVSS v4

Base Score: 8.8

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:L/SC:H/SI:H/SA:H

Severity: High

EPSS

EPSS: 0.00135