CVE-2026-86283

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Source

https://cve.org/CVERecord?id=CVE-2026-86283

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86283.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-86283

Published

2026-09-06T14:15:06Z

Modified

2026-09-10T03:30:46Z

Severity

7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

MISP UiBeta Collection View Bypasses Event ACL, Exposing Unauthorized Event Data

Details

MISP's UiBeta theme collection view (app/View/Themed/UiBeta/Collections/view.ctp) performed a secondary query of member events by UUID without applying the caller's access control list (ACL). The CollectionsController::view() action correctly resolved collection element UUIDs through Event::fetchSimpleEvents($user, ...), which enforces per-user event ACL. However, the view template independently re-queried the same UUIDs using only an Event.uuid IN (...) condition, omitting the createEventConditions() authorization filter. Because collection element UUIDs are stored without server-side authorization against the referenced event (CollectionElementsController::add() accepts whatever UUID the collection owner posts), an authenticated user with view access to a collection could retrieve full details of events they are not permitted to read. The exposed data included event identifiers, info, dates, timestamps, creator organization, all event tags, and galaxy clusters (the latter attached via a cluster-scoped rather than event-scoped ACL check). This constitutes an authorization bypass at the presentation layer, allowing horizontal privilege escalation across event boundaries within the MISP instance.

Database specific

{
    "cna_assigner": "CIRCL",
    "cwe_ids": [
        "CWE-285",
        "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86283.json"
}

References

Affected packages

Git / github.com/misp/misp

Affected ranges

Type

GIT

Repo

https://github.com/misp/misp

Events

Introduced

Fixed

44573e4a8

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "2.5.45"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86283.json"