CVE-2026-67349

OpenCost before 1.121.0 fails to authenticate the GET /helmValues endpoint, exposing base64-decoded HELM_VALUES environment variable containing cloud provider credentials. Additionally, adminAuthMiddleware fails open when ADMIN_TOKEN is unset, allowing unauthenticated attackers to modify GCP service account keys via POST /serviceKey to redirect billing calls.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/opencost/opencost/commit/a49a25bc2e0d6e220a131a4dc58f38ebe6ae851b
https://github.com/opencost/opencost/issues/3893
https://github.com/opencost/opencost/pull/3910
https://github.com/opencost/opencost/releases/tag/core/v1.121.0
https://www.vulncheck.com/advisories/opencost-unauthenticated-helm-values-exposure-and-admin-bypass

Configurations

No configuration.

History

30 Jul 2026, 15:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-30 15:16

Updated : 2026-07-31 23:17

NVD link : CVE-2026-67349

Mitre link : CVE-2026-67349

CVE.ORG link : CVE-2026-67349

JSON object : View

Products Affected

No product.

CWE

CWE-306

Missing Authentication for Critical Function

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