CVE-2026-112188 in MISP
Summary
by MITRE • 10/19/2026
MISP contains a vulnerability in its server settings lookup mechanism that allows an authenticated user to retrieve sensitive configuration data that should have been redacted.
The settings lookup function resolves a dotted setting name to a node in the configuration tree. When a branch name (such as Security, MISP, or Plugin) is supplied instead of a specific leaf setting, the function returns the entire sub-tree. Because a branch node does not carry a redaction flag, the redaction check in the settings retrieval endpoint is bypassed, and the full branch contents are returned to the caller. This exposes sensitive values including the security salt, Redis connection passwords, and plugin API keys.
A second endpoint that edits server settings similarly reads the entire configuration store when a branch name is resolved, returning all settings to the caller.
The impact is disclosure of sensitive server configuration secrets to any user who can access the server settings endpoints.
Affected versions: <2.5.48.
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Analysis
by VulDB Data Team • 10/19/2026
The vulnerability in MISP represents a critical flaw within its server settings management subsystem, specifically targeting the mechanism used for looking up and retrieving configuration parameters. This issue stems from an improper implementation of input validation and access control logic when resolving dotted setting names to nodes within the application's hierarchical configuration tree. The core technical failure occurs because the system fails to distinguish between requests for specific leaf-level settings and those requesting entire branch structures, such as Security, MISP, or Plugin sections. When a user provides a branch name rather than a specific key, the underlying function returns the complete sub-tree associated with that node. This behavior is problematic because individual configuration values often carry redaction flags designed to mask sensitive data like passwords and cryptographic keys during retrieval operations. However, since the parent branch nodes themselves do not possess these redaction attributes, the security checks intended to sanitize output are effectively bypassed for any request targeting a higher-level directory within the configuration hierarchy.
This architectural oversight leads directly to an unauthorized information disclosure vulnerability that affects authenticated users with access to server settings endpoints. By exploiting this flaw, an attacker can retrieve sensitive operational secrets including the MISP security salt, Redis connection passwords, and various plugin API keys without triggering any redaction protocols. The impact is severe as these credentials are fundamental to maintaining the integrity and confidentiality of the threat intelligence platform's backend infrastructure. Compromise of the security salt could allow for session forgery or token manipulation, while exposure of database or cache credentials like those for Redis enables potential data exfiltration or service disruption through unauthorized access to persistent storage layers. The existence of a second endpoint that edits server settings exacerbates this risk by similarly reading and returning the entire configuration store when branch names are resolved, further expanding the attack surface for information leakage within authenticated contexts.
From a classification perspective, this vulnerability aligns with CWE-209: Generation of Error Message Containing Sensitive Information and CWE-798: Use of Hard-coded Credentials if those credentials were improperly stored or managed as part of the configuration structure. It also maps to MITRE ATT&CK technique T1530: Data from Cloud Storage Object, specifically in the context of accessing internal data stores that contain sensitive system parameters. The lack of proper enumeration control allows an authenticated actor to perform a form of directory traversal against the application's logical configuration space, extracting bulk secrets rather than isolated values. This reflects a broader category of issues related to insufficient abstraction between administrative interfaces and underlying data structures, where the interface does not enforce granular access controls appropriate for sensitive metadata.
Mitigation strategies must focus on enforcing strict validation at the point of request processing within the settings lookup mechanism. Developers should ensure that any request targeting a branch node is either rejected outright or processed in a way that applies redaction rules recursively to all leaf nodes contained within that subtree before returning data to the client. Implementing explicit allow-lists for retrievable configuration keys can prevent broad enumeration attacks, ensuring that only specific, non-sensitive settings are exposed via public-facing endpoints unless explicitly authorized by high-privilege roles with additional verification steps. For affected versions prior to 2.5.48, immediate patching is required to resolve these logic flaws and restore proper redaction behavior across all configuration retrieval operations.