---
id: CVE-2026-67349
title: >-
  OpenCost before 1.121.0 fails to authenticate the GET /helmValues endpoint,
  exposing base64-decoded HELM_VALUES environment variable containing cloud
  provider credentials
summary: >-
  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 …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-306
published: '2026-07-30'
updated: '2026-07-31'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67349'
references:
  - url: >-
      https://github.com/opencost/opencost/commit/a49a25bc2e0d6e220a131a4dc58f38ebe6ae851b
    label: disclosure@vulncheck.com
  - url: 'https://github.com/opencost/opencost/issues/3893'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/opencost/opencost/pull/3910'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/opencost/opencost/releases/tag/core/v1.121.0'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/opencost-unauthenticated-helm-values-exposure-and-admin-bypass
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00497
epssPercentile: 0.40071
ingestedAt: '2026-08-01T22:15:46.086Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.