Two API authentication failure branches wrote directly to the Log model:
- API requests with no authentication key;
- requests supplying an API key with an incorrect length
Unlike other authentication failures, these paths bypassed _shouldLog(), so every request could create another durable auth_fail entry.
Version affected: ≤2.5.45
Metrics
Affected Vendors & Products
No advisories yet.
Solution
The fix applies the existing hourly per-key log throttle to the two previously unguarded authentication-failure log writes. The throttle key is now derived from the client's source IP address rather than from caller-supplied input, preventing an attacker from generating unbounded Redis throttle entries. A per-request memo (stored in Configure::read('CurrentRequestAuthFailKeys')) is added to _shouldLog() to prevent duplicate log entries when beforeFilter() executes a second time via CakeErrorController on an exception, ensuring one request produces at most one log entry per key regardless of the operator's log_each_individual_auth_fail setting.
Workaround
No workaround given by the vendor.
| Link | Providers |
|---|---|
| https://github.com/MISP/MISP/commit/2bf887433 |
|
Tue, 15 Sep 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 15 Sep 2026 13:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Misp
Misp misp |
|
| Vendors & Products |
Misp
Misp misp |
Tue, 15 Sep 2026 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Affected versions of MISP do not consistently apply the existing authentication-failure logging throttle. Two API authentication failure branches wrote directly to the Log model: - API requests with no authentication key; - requests supplying an API key with an incorrect length Unlike other authentication failures, these paths bypassed _shouldLog(), so every request could create another durable auth_fail entry. Version affected: ≤2.5.45 | |
| Title | MISP Unthrottled Authentication Failure Log Writes Enable Resource Exhaustion | |
| Weaknesses | CWE-400 CWE-770 |
|
| References |
| |
| Metrics |
cvssV4_0
|
Projects
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Status: PUBLISHED
Assigner: CIRCL
Published:
Updated: 2026-09-15T12:32:06.515Z
Reserved: 2026-09-15T11:43:17.522Z
Link: CVE-2026-92003
Updated: 2026-09-15T12:32:01.287Z
Status : Received
Published: 2026-09-15T12:17:55.757
Modified: 2026-09-15T13:16:47.553
Link: CVE-2026-92003
No data.
OpenCVE Enrichment
Updated: 2026-09-15T12:45:18Z