CVE-2026-48978
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.
How to fix
- oras.land/oras-go/v22.6.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| oras.land/oras-go/v2Go | v < 2.6.1 | 2.6.1 |
| oras.land/oras-goGo | v ≤ 1.2.7 | — |
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