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CVE-2026-40525

Volcengine Openviking authentication bypass

9.1 CRITICALPublic exploitEPSS 0.76%
  1. Published17 Apr 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Volcengine Openviking< 0.3.9

Remediation

Fixed in
Volcengine Openviking≥ 0.3.9

References

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Frequently asked

Is CVE-2026-40525 being actively exploited?

CVE-2026-40525 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.76%.

How severe is CVE-2026-40525?

CVE-2026-40525 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.76% probability of exploitation.

Which products are affected by CVE-2026-40525?

Affected products include Volcengine Openviking.

How do I fix CVE-2026-40525?

Upgrade affected software to a fixed version, for example Volcengine Openviking 0.3.9 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-40525 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.