CVE-2026-86408
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
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 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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| MISP | MISP | 0 <= 2.5.45 | affected |
Weaknesses
- CWE-862: CWE-862 Missing Authorization
- CWE-639: CWE-639 Authorization Bypass Through User-Controlled Key
References
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