oras-project oras-go up to 2.6.0 Client client.go Client.Do server-side request forgery

Summaryinfo

A vulnerability classified as critical has been found in oras-project oras-go up to 2.6.0. Impacted is the function Client.Do of the file registry/remote/auth/client.go of the component Client. This manipulation causes server-side request forgery. This vulnerability is registered as CVE-2026-48978. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in oras-project oras-go up to 2.6.0. Affected by this vulnerability is the function Client.Do of the file registry/remote/auth/client.go of the component Client. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-48978 since 05/27/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

Upgrading to version 2.6.1 eliminates this vulnerability.

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Productinfo

Type

• Project Management Software

Vendor

• oras-project

Name

• oras-go

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6.0

Website

• Product: https://github.com/oras-project/oras-go/

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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