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

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Advisories

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Fixes

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.

History

Tue, 15 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


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

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: CIRCL

Published:

Updated: 2026-09-15T12:32:06.515Z

Reserved: 2026-09-15T11:43:17.522Z

Link: CVE-2026-92003

cve-icon Vulnrichment

Updated: 2026-09-15T12:32:01.287Z

cve-icon NVD

Status : Received

Published: 2026-09-15T12:17:55.757

Modified: 2026-09-15T13:16:47.553

Link: CVE-2026-92003

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-15T12:45:18Z

Weaknesses