---
id: CVE-2026-86408
title: >-
  Affected versions of MISP do not enforce parent-event visibility when serving
  cryptographic keys through CryptographicKeysController::view().



  The vulnerable handler queried CryptographicKey directly using the supplied
  key ID and select…
summary: >-
  Affected versions of MISP do not enforce parent-event visibility when serving
  cryptographic keys through CryptographicKeysController::view().



  The vulnerable handler queried CryptographicKey directly using the supplied
  key ID and select…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-639
  - CWE-862
vendor: misp-project
product: misp
affected:
  - misp <= 2.5.45
published: '2026-09-07'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T15:26:17.753'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86408'
references:
  - url: 'https://github.com/MISP/MISP/commit/2edde619b'
    label: 5a6e4751-2f3f-4070-9419-94fb35b644e8
tags:
  - nvd
  - cve.org
epss: 0.00201
epssPercentile: 0.10257
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-08T14:49:41.763889Z'
scores:
  nvd: 6.5
  cna: 7.1
ingestedAt: '2026-09-08T15:33:26.977Z'
---

## Overview

Affected versions of MISP do not enforce parent-event visibility when serving cryptographic keys through CryptographicKeysController::view().


The vulnerable handler queried CryptographicKey directly using the supplied key ID and selected sensitive fields such as:



  *  
type


  *  
key_data


  *  
fingerprint





but did not fetch or authorize the associated parent event first.


The upstream commit explicitly states that cryptographicKeys/view could return a protected event’s signing key to any authenticated user.


The fix adds parent_id and parent_type to the lookup and then enforces authorization through the associated event using fetchSimpleEvent($user, parent_id). If the parent is not an Event, access is limited to site administrators.

Version affected: ≤2.5.45

## Affected

- `misp <= 2.5.45`

## Remediation

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