OpenCost before 1.121.0 fails to authenticate the GET /helmValues endpoint, exposing base64-decoded HELMVALUES environment variable containing cloud provider credentials. Additionally, adminAuthMiddleware fails open when ADMINTOKEN is unset, allowing unauthenticated attackers to modify GCP service account keys via POST /serviceKey to redirect billing calls.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67349.json",
"cwe_ids": [
"CWE-306"
],
"cna_assigner": "VulnCheck"
}