CVE-2026-86451

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Source
https://cve.org/CVERecord?id=CVE-2026-86451
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86451.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-86451
Published
2026-09-07T12:59:43Z
Modified
2026-09-09T03:48:16Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
MISP Event Graph Object Reference Lookup Exposes References from Unauthorized Objects
Details

Affected versions of MISP allow authenticated users to retrieve object-reference records by UUID through EventGraphTool::get_reference_data() without first checking whether the requester is authorized to view the object the reference belongs to.

The vulnerable code queried ObjectReference.uuid directly and returned the matching row whenever it existed. Because no parent-object ACL was applied, a user who knew or obtained a reference UUID could retrieve information associated with an object outside their normal access scope. The commit explicitly states that any object reference could be returned by UUID without authorizing its parent object.

The fix retrieves the referenced object's object_id and calls fetchObjectSimple() with the current user. If the user cannot access that parent object, MISP now returns NotFoundException instead of exposing the reference.

Version affected: ≤2.5.45

Database specific 
{
    "cna_assigner": "CIRCL",
    "cwe_ids": [
        "CWE-639",
        "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86451.json"
}
References

Affected packages

Git / github.com/misp/misp

Affected ranges

Type
GIT
Repo
https://github.com/misp/misp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
c0cb5c9f8
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-2026-86451.json"