oras-project oras-go up to 2.6.1 Hardlink Resolver content/file/utils.go ensureLinkPath Linkname path traversal

Summaryinfo

A vulnerability was found in oras-project oras-go up to 2.6.1 and classified as critical. Affected is the function ensureLinkPath of the file content/file/utils.go of the component Hardlink Resolver. The manipulation of the argument Linkname results in path traversal. This vulnerability is known as CVE-2026-50163. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in oras-project oras-go up to 2.6.1. It has been classified as critical. Affected is the function ensureLinkPath of the file content/file/utils.go of the component Hardlink Resolver. The manipulation of the argument Linkname with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

oras-go is a Go library for managing OCI artifacts. Prior to 2.6.2, ensureLinkPath in content/file/utils.go:262-275 validates a hardlink target relative to the extract base but returns the unresolved target, causing os.Link("victim.secret", "<extract_base>/payload.tar.gz/evil_cwd_link") to resolve header.Linkname against the process current working directory for a Typeflag=TypeLink entry such as Name=payload.tar.gz/evil_cwd_link and Linkname="victim.secret" with io.deis.oras.content.unpack: "true", which can expose or tamper with files such as .env, .git/config, .aws/credentials, and ~/.ssh/config. This issue is fixed in version 2.6.2.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-50163 since 06/03/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 2.6.2 eliminates this vulnerability.

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Productinfo

Type

• Project Management Software

Vendor

• oras-project

Name

• oras-go

Version

• 2.6.0
• 2.6.1

Website

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

CPE 2.3info

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CPE 2.2info

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