Vulnerability Description
MISP contains an insecure default configuration in which the Security.check_sec_fetch_site_header control is disabled. When this setting is disabled, state-changing requests such as POST, PUT, or AJAX requests are not restricted based on the browser-provided Sec-Fetch-Site header. A remote unauthenticated attacker could craft a malicious web page that causes an authenticated MISP user’s browser to issue cross-site requests to MISP automation endpoints. If successful, the forged requests may be processed with the privileges of the victim user, potentially allowing unauthorized modification of MISP data or configuration. Enabling Security.check_sec_fetch_site_header mitigates this issue, although operators of multi-homed MISP deployments should validate the setting before enforcing it.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-54359?
CVE-2026-54359 is a documented vulnerability. MISP contains an insecure default configuration in which the Security.check_sec_fetch_site_header control is disabled. When this setting is disabled, state-changing requests such as POST, PUT, or AJAX...
How severe is CVE-2026-54359?
CVSS scoring is not yet available for CVE-2026-54359. Check NVD for updates.
Is there a patch for CVE-2026-54359?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.