CVE-2026-67349

HIGH

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 v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Published: 7/30/2026Modified: 7/31/2026

Related Intelligence (1)

HIGHVulnerability

NVD HIGH: CVE-2026-67349 — OpenCost before 1.121.0 fails to authenticate the GET /helmValues endpoint, expo...

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.

CVE-2026-67349
NIST NVD

References (5)

https://github.com/opencost/opencost/commit/a49a25bc2e0d6e220a131a4dc58f38ebe6ae851bhttps://github.com/opencost/opencost/issues/3893https://github.com/opencost/opencost/pull/3910https://github.com/opencost/opencost/releases/tag/core/v1.121.0https://www.vulncheck.com/advisories/opencost-unauthenticated-helm-values-exposure-and-admin-bypass