Vulnerability 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.
Related Weaknesses (CWE)
References
- https://github.com/oras-project/oras-go/commit/7a9f4b0b9558821b0422152ebe21ae569
- https://github.com/oras-project/oras-go/releases/tag/v2.6.1
- https://github.com/oras-project/oras-go/security/advisories/GHSA-xf85-363p-868w
FAQ
What is CVE-2026-48978?
CVE-2026-48978 is a documented vulnerability. 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, allowi...
How severe is CVE-2026-48978?
CVSS scoring is not yet available for CVE-2026-48978. Check NVD for updates.
Is there a patch for CVE-2026-48978?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.