Description
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.
Published: 2026-07-30
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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History

Fri, 31 Jul 2026 23:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 30 Jul 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Opencost
Opencost opencost
Vendors & Products Opencost
Opencost opencost

Thu, 30 Jul 2026 15:00:00 +0000

Type Values Removed Values Added
Description 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.
Title OpenCost < 1.121.0 Unauthenticated Helm Values Exposure and Admin Bypass
Weaknesses CWE-306
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}


Subscriptions

Opencost Opencost
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-07-31T22:56:13.763Z

Reserved: 2026-07-29T13:36:36.277Z

Link: CVE-2026-67349

cve-icon Vulnrichment

Updated: 2026-07-31T22:56:08.385Z

cve-icon NVD

Status : Deferred

Published: 2026-07-30T15:16:36.900

Modified: 2026-07-31T23:17:26.310

Link: CVE-2026-67349

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T11:00:03Z

Weaknesses