Critical 9.1Published Apr 17, 2026

CVE-2026-40525OpenViking < 0.3.9 Authentication Bypass via VikingBot OpenAPI

Updated under an hour ago (2026-10-19 10:23 UTC)

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It affects volcengine OpenViking. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for volcengine OpenViking

Exploited in the last 30 days

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.

CVSS: 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-636
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Oct 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

volcengine OpenViking volcengine:openviking (from the name)	before 0.3.9; c7bb1676f4d037609f041bf39e4e2bd52e8f9820 not affected	CNA record
volcengine openviking volcengine:openviking	before 0.3.9	NVD

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.