Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/opencost/opencost/commit/a49a25bc2e0d6e220a131a4dc58f38ebe6ae
- 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-exposu
FAQ
What is CVE-2026-67349?
CVE-2026-67349 is a vulnerability with a CVSS score of 7.5 (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, adminAuthMiddl...
How severe is CVE-2026-67349?
CVE-2026-67349 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-67349?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.