CVE-2026-91857

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Source

https://cve.org/CVERecord?id=CVE-2026-91857

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91857.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-91857

Published

2026-09-15T09:14:43Z

Modified

2026-09-17T03:46:58Z

Severity

5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator

Summary

MISP: State-changing actions accessible via GET request enabling CSRF

Details

Affected versions of MISP expose several state-changing controller actions without restricting them to POST.

The affected actions are:

- EventReportsController::purgeUnusedPictures()

- NoticelistsController::enableNoticelist()

- ServersController::removeOrphanedCorrelations()

- WorkflowsController::rebuildRedis()

The patch adds allowMethod(['post']) to each action, preventing them from being triggered through ordinary GET requests.

For purgeUnusedPictures(), the corresponding UI previously used $.get(). The fix converts that request to POST and supplies X-CSRF-Token, while the controller enables header-only CSRF validation for that AJAX action.

Because GET requests can be induced cross-origin through links, images, redirects, or navigation, accepting GET for these state-changing operations can let an attacker trigger them using the authenticated victim's session.

Version affected: ≤2.5.45

Database specific

{
    "cna_assigner": "CIRCL",
    "cwe_ids": [
        "CWE-352"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91857.json"
}

References

Affected packages

Git / github.com/misp/misp

Affected ranges

Type

GIT

Repo

https://github.com/misp/misp

Events

Introduced

Fixed

b4a5486b5

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-2026-91857.json"