CVE-2026-81190
Description
A flaw was found in KurrentDB. An authenticated user authorized to read event streams can abuse secondary indexing query functionality to read arbitrary files accessible to the database service. This issue also allows the user to enumerate local directories and initiate unauthorized network requests from the database host, leading to sensitive information disclosure.
Statement
This vulnerability is rated as Moderate impact because exploitation requires high privileges to query the restricted stream, significantly constraining the attack surface in standard deployments. In typical configurations, access to this stream is restricted to administrative accounts, preventing unprivileged users from abusing secondary indexing queries to traverse directories or inspect local database files. Additionally, the scope of impact is limited to read operations, precluding arbitrary file modification or exposure of process environment variables.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Understanding the Weakness (CWE)
Integrity,Confidentiality
Technical Impact: Read Files or Directories
The application can operate on unexpected files, such as system files or configuration files. Confidentiality is violated when the targeted filename is not directly readable by the attacker.
Integrity,Confidentiality,Availability
Technical Impact: Modify Files or Directories; Execute Unauthorized Code or Commands
The application can operate on unexpected files. This may violate integrity if the filename is written to, or if the filename is for a program or other form of executable code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart; DoS: Resource Consumption (Other)
The application can operate on unexpected files. Availability can be violated if the attacker specifies an unexpected file that the application modifies. Availability can also be affected if the attacker specifies a filename for a large file, or points to a special device or a file that does not have the format that the application expects.
Frequently Asked Questions
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