CVE-2026-40525 json
OpenViking < 0.3.9 Authentication Bypass via VikingBot OpenAPI
published 2026-04-17 6 mo ago modified 2026-11-08 23 h ago also EUVD-2026-23464 , GHSA-jgq2-vq69-gr6h , PYSEC-2026-438
- cvss
- 9.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi openviking 0.3.9
- volcengine OpenViking 0.3.9
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 6 mo ago
Exploit prediction
0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/volcengine/OpenViking/pull/1447 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.1 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| GitHub | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| CNA | 4.0 | 9.1 | CVSS:4.0/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 |
| OSV | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | openviking | <0.3.9 |
0.3.9 |
Affected products
- volcengine OpenViking
Classification
- Weakness
-
- CWE-636 Not Failing Securely
References
-
github.com
/volcengine/OpenViking/pull/1447
issue-tracking, patch, web, exploit, vendor-advisory
-
github.com
/volcengine/OpenViking/commit/c7bb1676f4d037609f041bf39e4e2bd52e8f9820
patch, web
-
github.com
/volcengine/OpenViking/releases/tag/v0.3.9
release-notes, web
-
vulncheck.com
/advisories/openviking-authentication-bypass-via-vikingbot-openapi
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-40525
advisory
-
github.com
/volcengine/OpenViking
package
-
pypi.org
/project/openviking
package
-
github.com
/advisories/GHSA-jgq2-vq69-gr6h
advisory
Sources
- CVE List CVE-2026-40525
- GitHub Advisory GHSA-jgq2-vq69-gr6h
- NVD CVE-2026-40525
- OSV PYSEC-2026-438
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