---
cve: "CVE-2026-67349"
severity: "HIGH"
cvss: 8.7
epss: "0.3%"
vendor: "opencost"
kev: false
exploited: false
published: "2026-07-30 15:16:36"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T10:57:47+02:00"
---

# CVE-2026-67349

> 8.7 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- f5fc438c9a237847964aa561b5a593aa622f91df (Commit)
- a49a25bc2e0d6e220a131a4dc58f38ebe6ae851b (Commit)

## Referenzen

- <https://github.com/opencost/opencost/issues/3893>
- <https://github.com/opencost/opencost/releases/tag/core/v1.121.0>
- <https://github.com/opencost/opencost/pull/3910>
- <https://github.com/opencost/opencost/commit/a49a25bc2e0d6e220a131a4dc58f38ebe6ae851b>
- <https://www.vulncheck.com/advisories/opencost-unauthenticated-helm-values-exposure-and-admin-bypass>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-67349) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_