Arbitrary Code Execution via Kafka Configuration Path Traversal

MISP allowed an authenticated site administrator to set the Kafka_rdkafka_config setting to an arbitrary filesystem path. MISP subsequently parsed the referenced INI file and passed its options to rdkafka. A crafted attacker-controlled configuration file could use rdkafka options such as plugin.library.paths to load an external library, resulting in arbitrary code execution with the privileges of the MISP process. An attacker could leverage a MISP-writable location, such as an uploaded file or administrative image, to host the malicious configuration file. The issue is fixed by restricting the setting to absolute .ini files located only in approved configuration directories outside the webroot and MISP upload targets.

Casky was already ahead

This CVE exploits attack patterns that Casky's 446matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

This vulnerability affects MISP (Malware Information Sharing Platform), allowing authenticated site administrators to specify an arbitrary filesystem path for the Kafka_rdkafka_config setting. MISP then parses the referenced INI file and passes its options to rdkafka, enabling attackers to leverage rdkafka options like plugin.library.paths to load malicious external libraries. This results in arbitrary code execution with MISP process privileges. Organizations running MISP as a threat intelligence hub are at risk, particularly those with multiple administrators or those whose file systems contain attacker-writable locations such as upload directories. The attack chain requires initial authentication but offers a powerful privilege escalation path once access is gained.

Casky's 446 matching skills leverage Claude's extended reasoning to detect the attack patterns mapped across initial access (TA0001), resource development (TA0043), and execution (TA0002) techniques. Practitioners would observe detections for suspicious configuration file manipulation (CWE-829: Improper Control of a Resource Through its Lifetime), unauthorized library loading attempts, and process execution anomalies originating from the MISP application context. The platform would surface indicators such as unexpected file path specifications in MISP settings, attempts to parse INI files from non-standard locations, and rdkafka subprocess spawning with suspicious plugin parameters—enabling defenders to identify compromise before arbitrary code execution occurs.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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446 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-56447.

Abuse of Public-Facing API: Mobile API Abuse

mobile security · low

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abusing-dpapi-for-credential-access

red teaming · high

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abusing-shadow-credentials-for-privesc

red teaming · high

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MITRE ATT&CK Techniques

TA0001 TA0043 TA0002

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