CVE-2026-91859

MISP Access Log Entry Overwritten by Error Controller's Second beforeFilter Pass

MEDIUM
5.3
CVSS Score
Published: September 15, 2026 at 09:26 AM UTC
Updated: September 16, 2026 at 01:57 PM UTC
1 product affected across 1 vendorMISP

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

Description

Affected versions of MISP can record incorrect access-log data for requests that terminate in an exception. Because CakeErrorController extends AppController, exception rendering runs the application startup path a second time. As a result, __accessMonitor() calls AccessLog::logRequest() twice for one HTTP request. The second deferred writer measures the error-controller execution instead of the original request and can overwrite the row created by the first pass. The corrupted fields include request duration, SQL query count, memory usage, and potentially the recorded query log. The bug was masked because the same model instance retained the ID of the first saved row, causing the later save to issue an UPDATE rather than insert an obvious duplicate row. Version affected: ≤2.5.45

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.5.46
Affected range stops below 2.5.46, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMCIRCL
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-778CWE-223

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