CVE-2026-40525
OpenViking < 0.3.9 Authentication Bypass via VikingBot OpenAPI
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.
INFO
Published Date :
April 17, 2026, 7:16 p.m.
Last Modified :
May 5, 2026, 6:06 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update OpenViking to commit c7bb167 or later.
- Ensure api_key is always set and not empty.
- Restrict network access to the exposed service.
- Regularly review access logs for suspicious activity.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-40525.
| URL | Resource |
|---|---|
| https://github.com/volcengine/OpenViking/commit/c7bb1676f4d037609f041bf39e4e2bd52e8f9820 | Patch |
| https://github.com/volcengine/OpenViking/pull/1447 | Exploit Patch Vendor Advisory |
| https://github.com/volcengine/OpenViking/releases/tag/v0.3.9 | Release Notes |
| https://www.vulncheck.com/advisories/openviking-authentication-bypass-via-vikingbot-openapi | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40525 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-40525
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40525 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40525 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 05, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:volcengine:openviking:*:*:*:*:*:*:*:* versions up to (excluding) 0.3.9 Added Reference Type VulnCheck: https://github.com/volcengine/OpenViking/commit/c7bb1676f4d037609f041bf39e4e2bd52e8f9820 Types: Patch Added Reference Type VulnCheck: https://github.com/volcengine/OpenViking/pull/1447 Types: Exploit, Patch, Vendor Advisory Added Reference Type VulnCheck: https://github.com/volcengine/OpenViking/releases/tag/v0.3.9 Types: Release Notes Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/openviking-authentication-bypass-via-vikingbot-openapi Types: Third Party Advisory -
CVE Modified by [email protected]
Apr. 21, 2026
Action Type Old Value New Value Changed Description OpenViking prior to commit c7bb167 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. 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. Added Reference https://github.com/volcengine/OpenViking/releases/tag/v0.3.9 -
New CVE Received by [email protected]
Apr. 17, 2026
Action Type Old Value New Value Added Description OpenViking prior to commit c7bb167 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. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-636 Added Reference https://github.com/volcengine/OpenViking/commit/c7bb1676f4d037609f041bf39e4e2bd52e8f9820 Added Reference https://github.com/volcengine/OpenViking/pull/1447 Added Reference https://www.vulncheck.com/advisories/openviking-authentication-bypass-via-vikingbot-openapi