CVE-2026-48978 (GCVE-0-2026-48978)

Vulnerability from cvelistv5 – Published: 2026-07-17 19:34 – Updated: 2026-07-21 02:06
VLAI
Title
oras-go: Malicious registry can hijack Bearer token realm to exfiltrate credentials and refresh tokens
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.
Severity
2.1 (Low)
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-21 02:06 UTC
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
  • CWE-319 - Cleartext Transmission of Sensitive Information
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7668 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
oras-project oras-go Affected: < 2.6.1
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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