CVE-2026-92002

MISP: Authentication failure logging suppressed during Redis unavailability

Published Sep 15, 2026 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Description
Affected versions of MISP use Redis to throttle repeated authentication-failure log entries. The intent is to avoid excessive duplicate logs while still recording failed authentication activity.


However, User->setupRedis() returns false when Redis cannot be reached. The vulnerable _shouldLog() logic only returned true when a Redis instance existed and no throttle key was present. Therefore, when Redis was unavailable, the function did not allow the log write at all, effectively silencing authentication-failure logging for the duration of the outage.

Version affected: ≤2.5.45

Remediation

Vendor Solution

The _shouldLog() method now explicitly checks whether the Redis connection is available before attempting to use it. If setupRedis() returns false, the method immediately returns true, causing every authentication-failure event to be logged. This converts the previous fail-closed behavior (silence on dependency failure) into a fail-open behavior for security logging (log everything when the throttle state is unavailable), ensuring that a Redis outage cannot be used to suppress the audit trail of failed authentication attempts.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Misp
Misp misp
Vendors & Products Misp
Misp misp
Type Values Removed Values Added
Description Affected versions of MISP use Redis to throttle repeated authentication-failure log entries. The intent is to avoid excessive duplicate logs while still recording failed authentication activity. However, User->setupRedis() returns false when Redis cannot be reached. The vulnerable _shouldLog() logic only returned true when a Redis instance existed and no throttle key was present. Therefore, when Redis was unavailable, the function did not allow the log write at all, effectively silencing authentication-failure logging for the duration of the outage. Version affected: ≤2.5.45
Title MISP: Authentication failure logging suppressed during Redis unavailability
Weaknesses CWE-778
References
Metrics cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
CIRCL
Published
Updated
Sep 15, 2026, 12:09 PM
Reserved
Sep 15, 2026, 11:24 AM
Status
Deferred
Published
Sep 15, 2026, 12:17 PM
Modified
Sep 16, 2026, 1:42 PM