MISP: Authentication failure logging suppressed during Redis unavailability

MISP: Authentication failure logging suppressed during Redis unavailability

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

Source published

15 Sep 2026 11:24:21 UTC

Source modified

15 Sep 2026 12:09:48 UTC

Saved here

23 Oct 2026 15:48:27 UTC

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CVSS 4.0 · 5.1 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