CVE-2026-95658: MISP CSRF vulnerability in workflow moduleStatelessExecution allows cross-site execution of workflow modules

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of 29 Oct 2026. If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?

0.3%

EPSS score, percentile 18.6 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?

6.9 Medium

CVSS v4.0 base score, given by the CNA

What should I do?

The moduleStatelessExecution action is removed from the unlockedActions list, restoring the CSRF token check. Full textSolution from the CVE record.

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (1)

Which versions are affected?

Affected

• before 2.5.47

Versions by product

Source: CISA KEV 2026.10.29, as of 29 Oct 2026; FIRST EPSS, as of 29 Oct 2026; CVE List, as of 29 Oct 2026. About the data.

What to do

Solution (from the CVE record)

The moduleStatelessExecution action is removed from the unlockedActions list, restoring the CSRF token check. A new mechanism (_csrfTokenHeaderOnly) is introduced that enforces the CSRF token while exempting only the field hash, which the legitimate caller (the module dialog) cannot produce because it posts a hand-built object. The module dialog's AJAX request is updated to send the CSRF token in the X-CSRF-Token header, satisfying the token check without requiring a field hash.

Advisories and patches

• Security patch (Patch)

This summary is based on the CVE record as of 29 Oct 2026. Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

As listed in the CVE record.

Source: CVE List, as of 29 Oct 2026. About the data.

About this vulnerability

MISP's WorkflowsController exposed the moduleStatelessExecution action in the Security component's unlockedActions list. In CakePHP, listing an action in unlockedActions disables both the CSRF token check and the field hash validation for that action. Because moduleStatelessExecution executes a workflow module's exec() method with caller-supplied input and parameters, the absence of CSRF protecti…

Summary: CVE record, as of 29 Oct 2026.

• CISA has not added CVE-2026-95658 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
• The CVE record was published on 22 Sep 2026.
• The CVE record carries a CVSS v4.0 base score of 6.9 (Medium), given by its CNA.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.3% (percentile 18.6), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
• CISA's SSVC assessment in the CVE record: exploitation none, automatable no, technical impact partial.
• The credits in the CVE record name Anthropic (Claude) as finder.

Source: CISA KEV 2026.10.29, as of 29 Oct 2026; CVE List, as of 29 Oct 2026; FIRST EPSS, as of 29 Oct 2026. About the data.

Description

MISP CSRF vulnerability in workflow moduleStatelessExecution allows cross-site execution of workflow modules

MISP's WorkflowsController exposed the moduleStatelessExecution action in the Security component's unlockedActions list. In CakePHP, listing an action in unlockedActions disables both the CSRF token check and the field hash validation for that action. Because moduleStatelessExecution executes a workflow module's exec() method with caller-supplied input and parameters, the absence of CSRF protection allowed an attacker to craft a cross-site form post (or equivalent cross-origin request) that, when submitted by an authenticated site administrator, would cause the administrator's browser to invoke the action on the MISP instance.  The attacker could select any workflow module to execute, including action modules that write blocklist and warninglist entries, and supply arbitrary input and parameters of their choosing. This constitutes a cross-site request forgery (CSRF) vulnerability with high integrity impact on the MISP instance's security-related data.  The vulnerability was identified during an internal security review and was not externally reported. The fix is included in MISP v2.5.47.

Source: CVE List, as of 29 Oct 2026. About the data.

Timeline