What is CVE-2026-67349?

CVE-2026-67349 is a high-severity vulnerability in Opencost, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-07-30.

How severe is CVE-2026-67349?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Opencost

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 un…

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Opencost — versions 0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-67349?: CVE-2026-67349 is a high-severity vulnerability in Opencost, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-07-30.
How severe is CVE-2026-67349?: High severity. CVSS v3 base score is 7.5 out of 10.