CVE-2026-48978

Summary

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.

Affected Software

VendorProductVersion RangeStatus
oras-projectoras-go< 2.6.1affected

Weaknesses

  • CWE-918: CWE-918: Server-Side Request Forgery (SSRF)
  • CWE-319: CWE-319: Cleartext Transmission of Sensitive Information

References