Vulnerability Details CVE-2026-40525
OpenViking prior to version 0.3.9 contains an authentication bypass vulnerability in the VikingBot OpenAPI HTTP route surface where the authentication check fails open when the api_key configuration value is unset or empty. Remote attackers with network access to the exposed service can invoke privileged bot-control functionality without providing a valid X-API-Key header, including submitting attacker-controlled prompts, creating or using bot sessions, and accessing downstream tools, integrations, secrets, or data accessible to the bot.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 33.0%
CVSS Severity
CVSS v3 Score 9.1
References
Products affected by CVE-2026-40525
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cpe:2.3:a:volcengine:openviking:*