CVE-2026-91825

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Source
https://cve.org/CVERecord?id=CVE-2026-91825
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91825.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-91825
Published
2026-09-15T08:06:32Z
Modified
2026-09-18T03:30:51Z
Severity
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
MISP: Missing Authorization Check for Event Sharing Group When Distribution Field Is Omitted During Edit
Details

Affected versions of MISP fail to authorize a submitted sharing group in a specific event-edit path.

The vulnerable logic checked whether the acting user could use a sharing_group_id only when the request explicitly supplied distribution = 4. If the attacker instead omitted distribution but supplied a different sharing_group_id, that authorization branch was skipped. Later, MISP’s field-recovery logic restored the existing event distribution from storage. For events already configured with sharing-group distribution, the unauthorized sharing-group ID could therefore be saved.

The fix adds authorization checks in both the controller and Event::_edit() whenever a non-empty sharing_group_id is supplied without distribution. The model now calls SharingGroup::checkIfAuthorised() before persisting the change.

Version affected: ≤2.5.45

Database specific 
{
    "cna_assigner": "CIRCL",
    "cwe_ids": [
        "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91825.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
cf3ee4026
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.5.46"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91825.json"