CVE-2026-67349

HIGH8.7

OpenCost < 1.121.0 Unauthenticated Helm Values Exposure and Admin Bypass

Published Jul 30, 2026

Modified 3 weeks ago

Details

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.

References

FIX

https://github.com/opencost/opencost/commit/a49a25bc2e0d6e220a131a4dc58f38ebe6ae851b

DETECTION

https://github.com/opencost/opencost/issues/3893

FIX

https://github.com/opencost/opencost/pull/3910

WEB

https://github.com/opencost/opencost/releases/tag/core/v1.121.0

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-67349

ADVISORY