What’s Vulnerable › Vulnerabilities
CVE-2026-56446: Authenticated Remote Code Execution via Arbitrary NDJSON Error Log Path in MISP
- Severity: high (CVSS 7.2 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-22 · updated 2026-06-23
- Weakness: CWE-94
Description
MISP allowed a site administrator to configure an arbitrary filesystem path for the NDJSON error log used by JsonLogTool. Because log entries can include attacker-controlled content, an authenticated attacker with site administrator privileges could direct log output to a PHP file in a web-accessible directory and inject PHP code through logged data. Accessing the resulting file could lead to remote code execution with the privileges of the web server process. The fix restricts log destinations to existing directories beneath APP/tmp/logs or /var/log, requires absolute paths, rejects stream wrappers and traversal-related input, and limits filenames to .log or .ndjson extensions while disallowing executable extension segments.
Affected products
- MISP: before 2.5.42 — fixed in 2.5.42
How to fix
Upgrade to a fixed version: MISP 2.5.42. Check the vendor advisory for mitigations.
References
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