CVE-2026-56446 Authenticated Remote Code Execution via Arbitrary NDJSON Error Log Path in MISP
Authenticated site administrators can achieve remote code execution by configuring the NDJSON error log to a web-accessible PHP file and injecting code via log entries.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56446?
CVE-2026-56446 is a high-severity code injection vulnerability in Misp-Project Misp, published on 22 Jun 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-94
Which versions are affected by CVE-2026-56446?
It affects 1 product.
Products include Misp-Project Misp.
How do I fix CVE-2026-56446?
No fix has been published for CVE-2026-56446 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-56446 being exploited?
There is no known exploitation of CVE-2026-56446 in the wild and no public exploit code.
Other vulnerabilities in Misp-Project Misp
Sources
Also known as GHSA-7v9f-64q7-x2jg.