{"id":"CVE-2026-48978","revision":"051297256be445da9cc02ddb3b575fec","records":[{"revision":"051297256be445da9cc02ddb3b575fec","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-48978","aliases":[],"title":"oras-go: Malicious registry can hijack Bearer token realm to exfiltrate credentials and refresh tokens","description":"oras-go is a Go library for managing OCI artifacts. Prior to 2.6.1, auth.Client follows the realm URL from a registry's WWW-Authenticate: Bearer challenge without validating the scheme or host, allowing a malicious or compromised registry to cause SSRF to internal networks such as http://169.254.169.254/, http://10.0.0.x/, and http://127.0.0.1/, or to downgrade a registry contacted over https:// to an http:// token endpoint in registry/remote/auth/client.go through Client.Do(), Client.fetchBearerToken(), fetchDistributionToken, and fetchOAuth2Token. This issue is fixed in version 2.6.1.","state":0,"publishedAt":"2026-07-17T19:34:53.69+00:00","modifiedAt":"2026-07-21T02:06:49.654+00:00","affected":[{"ecosystem":"Vendor product","name":"oras-go","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"oras-project\",\n                    \"product\": \"oras-go\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.6.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":2.1,"severity":"LOW"}],"references":["https://github.com/oras-project/oras-go/security/advisories/GHSA-xf85-363p-868w","https://github.com/oras-project/oras-go/commit/7a9f4b0b9558821b0422152ebe21ae56930fe764","https://github.com/oras-project/oras-go/releases/tag/v2.6.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-48978","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-48978","identifiers":["CVE-2026-48978"]},"retained":false,"historicalAffected":[]}],"coverage":[]}