CVE-2026-67349 OpenCost < 1.121.0 Unauthenticated Helm Values Exposure and Admin Bypass
Unauthenticated attackers can expose cloud credentials and modify service keys due to missing authentication on specific endpoints.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-67349?
CVE-2026-67349 is a high-severity missing authorization vulnerability in opencost, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-306
Which versions are affected by CVE-2026-67349?
How do I fix CVE-2026-67349?
No fix has been published for CVE-2026-67349 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-67349 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67349 exists.
Sources
Also known as GHSA-fq2p-hx59-r7g8.