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CVE-2026-40525 volcengine CVE debrief

OpenViking prior to version 0.3.9 contains a critical authentication bypass vulnerability in the VikingBot OpenAPI HTTP route surface. This vulnerability allows remote attackers with network access to invoke privileged bot-control functionality without a valid X-API-Key header when the api_key configuration value is unset or empty. The vulnerability enables attackers to submit attacker-controlled prompts, create or use bot sessions, and access downstream tools, integrations, secrets, or data accessible to the bot. Users of OpenViking prior to version 0.3.9 should be aware of this critical vulnerability and take immediate action to upgrade to version 0.3.9 or apply compensating controls to prevent exploitation.

Vendor
volcengine
Product
OpenViking
CVSS
CRITICAL 9.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-17
Original CVE updated
2026-07-14
Advisory published
2026-04-17
Advisory updated
2026-07-14

Who should care

Users of OpenViking prior to version 0.3.9, operators of affected systems, platform administrators, vulnerability management teams, and security teams should be aware of this critical vulnerability and take immediate action to upgrade to version 0.3.9 or apply compensating controls to prevent exploitation. This vulnerability may impact managed environments, and owners should confirm whether affected product deployments exist and assign an owner for follow-up.

Technical summary

The vulnerability exists in the VikingBot OpenAPI HTTP route surface of OpenViking. When the api_key configuration value is unset or empty, the authentication check fails open, allowing remote attackers to invoke privileged bot-control functionality without a valid X-API-Key header. This includes submitting attacker-controlled prompts, creating or using bot sessions, and accessing downstream tools, integrations, secrets, or data accessible to the bot. The vulnerability has a CVSS score of 9.1 and is classified as CRITICAL, requiring immediate attention to prevent exploitation.

Defensive priority

This vulnerability has a CVSS score of 9.1 and is classified as CRITICAL. Immediate attention is required to prevent exploitation. Defenders should prioritize verifying the api_key configuration value, implementing compensating controls, and monitoring for suspicious activity related to the VikingBot OpenAPI.

Recommended defensive actions

  • Upgrade OpenViking to version 0.3.9 or later
  • Verify the api_key configuration value is set and not empty
  • Implement compensating controls to restrict access to the exposed service
  • Monitor for suspicious activity related to the VikingBot OpenAPI
  • Review relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-04-17T19:16:39.017Z and was last modified on 2026-07-14T21:16:49.610Z. The NVD entry is currently Analyzed. This information is based on the provided source corpus and may not reflect the full scope of the vulnerability. Further verification is recommended to ensure accurate understanding of the vulnerability's impact.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-17T19:16:39.017Z and has not been modified since then. The NVD entry is currently Analyzed.