CVE-2026-75854 in ArcadeDB
Summary
by MITRE • 08/18/2026
ArcadeDB versions before 26.8.1 contain a missing authentication vulnerability in the Redis wire-protocol plugin that allows unauthenticated attackers to read, write, and delete data. Attackers can connect to the Redis port and execute arbitrary commands against any database on the server without providing credentials, bypassing all security gates.
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Analysis
by VulDB Data Team • 08/18/2026
The vulnerability identified in ArcadeDB versions prior to 26.8.1 represents a critical failure in access control mechanisms within the system's compatibility layer for the Redis wire protocol. This flaw specifically affects the plugin designed to allow ArcadeDB to interoperate with applications expecting a standard Redis interface, which is widely used due to its simplicity and performance characteristics. The core technical issue stems from an improper implementation of authentication checks during the initial connection handshake phase. When a client initiates a TCP connection to the designated Redis port on the server running this vulnerable version of ArcadeDB, the system fails to enforce credential verification before processing subsequent commands. This means that any network actor with connectivity to the host can establish a session and immediately begin interacting with the database engine as if they were an authorized administrator or user with full privileges.
From a technical perspective, this is classified as CWE-287, Improper Authentication, where the system does not adequately verify identity before granting access to resources. The operational impact of this vulnerability is severe because it effectively nullifies all security configurations related to database users and permissions for any client connecting via the Redis protocol. An unauthenticated attacker can exploit this by sending standard Redis commands such as GET, SET, DEL, or FLUSHDB directly through the wire interface. Since these operations are executed without authentication checks, attackers gain unrestricted read access to sensitive data stored in ArcadeDB, including potentially confidential user information, application state, and configuration details. Furthermore, write capabilities allow for data modification, insertion of malicious payloads, or complete deletion of datasets, leading to total loss of integrity and availability depending on the attacker's intent.
This vulnerability aligns with MITRE ATT&CK technique T1078, Valid Accounts, although in this case, it is more accurately described as bypassing account validation entirely rather than stealing valid credentials. The ability to execute arbitrary commands against any database on the server means that an attacker can pivot from data exfiltration to destructive actions like dropping tables or clearing caches, which could cause significant service disruption for downstream applications relying on ArcadeDB. In environments where Redis compatibility is used for caching layers or real-time analytics pipelines, this flaw exposes a wide attack surface because many services may trust the local database connection without additional network-level security controls such as IP whitelisting or TLS encryption with mutual authentication.
Mitigation strategies must focus immediately on upgrading to ArcadeDB version 26.8.1 or later, where the authentication logic for the Redis wire-protocol plugin has been corrected to enforce credential verification before allowing command execution. Until an upgrade is feasible, organizations should implement network-level restrictions by configuring firewalls to restrict access to the specific port used by the Redis protocol to only trusted IP addresses and application servers. Additionally, enabling Transport Layer Security (TLS) for all database connections can provide a layer of encryption that prevents eavesdropping on command traffic, although it does not fully mitigate the authentication bypass if the client certificate validation is also misconfigured. It is critical to audit logs for any unauthorized connection attempts or unusual query patterns originating from untrusted sources during the window of exposure to assess potential data compromise and determine the scope of remediation required beyond the software patch.