Vulnerability · Published Apr 17, 2026 · Assigned by VulnCheck

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

Critical 9.1

In plain English

A critical-severity security flaw in OpenViking from volcengine. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)0.6%top 52.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	openviking	0.3.9	GHSA-jgq2-vq69-gr6h
PyPI	openviking	0.3.9	PYSEC-2026-438

Affected products (as reported)

Vendor	Product	Versions
volcengine	OpenViking	0 – before 0.3.9

Weakness: CWE-636 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

https://github.com/volcengine/OpenViking/releases/tag/v0.3.9 release-notes
https://github.com/volcengine/OpenViking/pull/1447 issue-tracking
https://github.com/volcengine/OpenViking/commit/c7bb1676f4d037609f041bf39e4e2bd52e8f9820 patch
https://www.vulncheck.com/advisories/openviking-authentication-bypass-via-vikingbot-openapi third-party-advisory