VULNERABILITY INTELLIGENCE

CVE-2026-86408

CVSS score6.5 MEDIUM
EPSS probability0.34%
CISA KEVNot currently listed
Published2026-09-07
Last modified2026-09-09
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Description

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

Weakness classification

  • 5a6e4751-2f3f-4070-9419-94fb35b644e8: CWE-639

Primary references