CVE-2026-67349CWE-306

CVE-2026-67349

High · published July 30, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
41.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00497 · 41.7th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-07-30T19:16Z
References (5)
https://github.com/opencost/opencost/commit/a49a25bc2e0d6e220a131a4dc58f38ebe6ae851b · [email protected]https://github.com/opencost/opencost/issues/3893 · [email protected]https://github.com/opencost/opencost/pull/3910 · [email protected]https://github.com/opencost/opencost/releases/tag/core/v1.121.0 · [email protected]https://www.vulncheck.com/advisories/opencost-unauthenticated-helm-values-exposure-and-admin-bypass · [email protected]
EPSS history
Timeline
  • 30 JUL 14:40Z
    OpenCost < 1.121.0 Unauthenticated Helm Values Exposure and Admin Bypass
    cvelistv5