Bug 2499689 (CVE-2026-48978) - CVE-2026-48978 oras-go: oras-go: Information disclosure and TLS downgrade via malicious registry realm
Summary: CVE-2026-48978 oras-go: oras-go: Information disclosure and TLS downgrade via...
Keywords:
Status: NEW
Alias: CVE-2026-48978
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-13 14:40 UTC by OSIDB Bzimport
Modified: 2026-07-14 10:07 UTC (History)
9 users (show)

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Description OSIDB Bzimport 2026-07-13 14:40:24 UTC 
oras-go's auth.Client follows the realm URL from a registry's WWW-Authenticate: Bearer challenge without validating its scheme or host. A malicious registry can set a realm pointing to internal networks (SSRF to IMDS, RFC 1918) or use http:// scheme to downgrade TLS, causing oras-go to send credentials over plaintext. Affected: oras.land/oras-go/v2 <= v2.6.0. Fixed in v2.6.1.
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