{"id":"EUVD-2026-78874","revision":"7620c913d85a4b8dbe4e76356dbba39b","records":[{"revision":"7620c913d85a4b8dbe4e76356dbba39b","observedAt":"2026-11-07T10:29:52.371+00:00","statement":{"source":"euvd","id":"EUVD-2026-78874","aliases":["CVE-2026-44300","GHSA-wmj8-9953-vff5"],"title":"OpenCost provides cost monitoring for Kubernetes workloads and cloud costs. Prior to 1.121.0, the POST /serviceKey endpoint in pkg/costmodel/router.go allows a network client to invoke AddServiceKey without mandatory authentication and subm…","description":"OpenCost provides cost monitoring for Kubernetes workloads and cloud costs. Prior to 1.121.0, the POST /serviceKey endpoint in pkg/costmodel/router.go allows a network client to invoke AddServiceKey without mandatory authentication and submit an arbitrary key form value that is written to the GCP service-account key.json file returned by GetGCPAuthSecretFilePath in core/pkg/env/core.go. The attacker controls the file contents but not the CONFIG_PATH-derived directory, the key.json filename, or the file mode. Replacing the credential contents can disrupt GCP cost collection or cause OpenCost to use attacker-selected credentials, and the wildcard Access-Control-Allow-Origin response permits browser-assisted requests when the service is reachable from a browser. This issue is fixed in version 1.121.0.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.8,"severity":null}],"references":["https://github.com/opencost/opencost/security/advisories/GHSA-wmj8-9953-vff5","https://github.com/opencost/opencost/pull/3651","https://github.com/opencost/opencost/pull/3910","https://github.com/opencost/opencost/commit/69430e7f627b3e62c8999312c06949267fab813a","https://github.com/opencost/opencost/commit/a49a25bc2e0d6e220a131a4dc58f38ebe6ae851b","https://github.com/opencost/opencost/releases/tag/v1.120.0","https://github.com/opencost/opencost/releases/tag/v1.121.0"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-78874","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 15, 2026, 5:08:15 PM","dateUpdated":"Sep 15, 2026, 7:45:01 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-78874","identifiers":["EUVD-2026-78874","CVE-2026-44300","GHSA-wmj8-9953-vff5"]},"retained":false,"historicalAffected":[]}],"coverage":[]}