CVE-2026-54359 Details
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.
A cross-site request forgery (CSRF) vulnerability has been identified in MISP (Malware Information Sharing Platform) versions prior to 2.5.40. The issue arises from an insecure default configuration that disables the Security.check_sec_fetch_site_header control. When this control is turned off, state-changing requests such as POST, PUT, or AJAX are not regulated by the browser's Sec-Fetch-Site header. This allows remote, unauthenticated attackers to create malicious web pages that can trick authenticated MISP users into sending cross-site requests to MISP automation endpoints. If these requests are successful, they may be executed with the privileges of the affected user, potentially leading to unauthorized changes in MISP data or configuration.
Users are advised to enable the Security.check_sec_fetch_site_header setting. However, those with multi-homed MISP deployments should validate the setting before enforcing it.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 12, 2026CISA-ADP
Assessed Jun 15, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/MISP/MISP/commit/b82db1bcaa550689c05e1ed175e81f25a8d97b91 | CIRCL | Source CodeVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1188 | Initialization of a Resource with an Insecure Default | CIRCL |
| CWE-352 | Cross-Site Request Forgery (CSRF) | CIRCL |
Affected Products
| Product | Versions |
|---|---|
| MISP | All versions |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | CIRCL |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 12, 2026 | New CVE Received | CIRCL |