MISP up to 2.5.41 PHP File /tmp/logs code injection

Summaryinfo

A vulnerability classified as critical was found in MISP up to 2.5.41. Affected by this vulnerability is an unknown functionality of the file /tmp/logs of the component PHP File Handler. Such manipulation leads to code injection. This vulnerability is referenced as CVE-2026-56446. It is possible to launch the attack remotely. No exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in MISP up to 2.5.41. It has been rated as problematic. Affected by this issue is an unknown function of the file /tmp/logs of the component PHP File Handler. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was published by Jeroen Pinoy and Jakub Chyliński as 9600d486ccfc98388e13897fd954350cebac5fb0. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-56446 since 06/22/2026. The exploitation is known to be difficult. The attack may be launched remotely. The exploitation requires an enhanced level of successful authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.

Applying the patch 9600d486ccfc98388e13897fd954350cebac5fb0 is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Name

• MISP

Version

• 2.5.0
• 2.5.1
• 2.5.2
• 2.5.3
• 2.5.4
• 2.5.5
• 2.5.6
• 2.5.7
• 2.5.8
• 2.5.9
• 2.5.10
• 2.5.11
• 2.5.12
• 2.5.13
• 2.5.14
• 2.5.15
• 2.5.16
• 2.5.17
• 2.5.18
• 2.5.19
• 2.5.20
• 2.5.21
• 2.5.22
• 2.5.23
• 2.5.24
• 2.5.25
• 2.5.26
• 2.5.27
• 2.5.28
• 2.5.29
• 2.5.30
• 2.5.31
• 2.5.32
• 2.5.33
• 2.5.34
• 2.5.35
• 2.5.36
• 2.5.37
• 2.5.38
• 2.5.39
• 2.5.40
• 2.5.41

License

• open-source

Website

• Product: https://github.com/MISP/MISP/

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