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CVE-2026-48978— oras-go: Malicious registry can hijack Bearer token realm to exfiltrate credentials and refresh tokens

Quick assessment

Affected
oras-project oras-go
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

oras-project oras-go是oras-project组织的一个基于OCI标准的内容分发库软件。 oras-project oras-go 2.6.1之前版本存在安全漏洞，该漏洞源于验证机制不当，允许恶意或受攻击的注册中心导致服务端请求伪造，访问内部网络。

AI Predicted 6.5 Difficulty: Easy EPSS 0.21% · P11

Affected Version Matrix 1

VendorProduct Version RangeStatus
oras-project oras-go < 2.6.1 affected
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I. Basic Information for CVE-2026-48978

Vulnerability Information
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Vulnerability Title
oras-go: Malicious registry can hijack Bearer token realm to exfiltrate credentials and refresh tokens
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
oras-project oras-go 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
oras-project oras-go是oras-project组织的一个基于OCI标准的内容分发库软件。 oras-project oras-go 2.6.1之前版本存在安全漏洞，该漏洞源于验证机制不当，允许恶意或受攻击的注册中心导致服务端请求伪造，访问内部网络。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
oras-project oras-go < 2.6.1 -

II. Public POCs for CVE-2026-48978

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III. Intelligence Information for CVE-2026-48978

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Patches & Fixes for CVE-2026-48978 (1)

Vendor Advisories for CVE-2026-48978 (1)

Vendor Pages for CVE-2026-48978 (1)

Same Patch Batch · oras-project · 2026-07-17 · 4 CVEs total

CVE-2026-50151 7.5 HIGH oras-go: credential forwarding via unvalidated Location header in blob upload
CVE-2026-50163 7.1 HIGH oras-go: Hardlink entry with relative Linkname escapes extract dir via process CWD resolut
CVE-2026-50162 oras-go: file store write outside workingDir via symlink traversal

IV. Related Vulnerabilities

Same product: oras-go
Same vendor: oras-project
Same weakness: CWE-918