CVE-2026-40525
OpenViking < 0.3.9 Authentication Bypass via VikingBot OpenAPI
- State
- Published
- Severity
- 9.1 Critical
- Published
- Apr 17, 2026
- Updated
- Oct 8, 2026
- Reserved
- Apr 13, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.1 Critical | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-636 Not Failing Securely ('Fail Open')
Affected Products
| Product | Versions |
|---|---|
OpenVikingvolcengine |
|
References
- https://github.com/volcengine/OpenViking/releases/tag/v0.3.9release-notes
- https://github.com/volcengine/OpenViking/pull/1447issue-tracking
- https://github.com/volcengine/OpenViking/commit/c7bb1676f4d037609f041bf39e4e2bd52e8f9820patch
- https://www.vulncheck.com/advisories/openviking-authentication-bypass-via-vikingbot-openapithird-party-advisory
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