CVE-2026-50163

HIGH 7.1

oras-go: Hardlink entry with relative Linkname escapes extract dir via process CWD resolution in `oras-go` tar extraction

CVSS Score

7.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-22 CWE-59
Vendor	oras-project
Product	oras-go
Published	Jul 17, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

Affected Versions

oras-project / oras-go

< 2.6.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/oras-project/oras-go/security/advisories/GHSA-fxhp-mv3v-67qp github.com: https://github.com/oras-project/oras-go/pull/1232 github.com: https://github.com/oras-project/oras-go/commit/c463c654ab3ef34422c1764cd619806cebf20451 github.com: https://github.com/oras-project/oras-go/releases/tag/v2.6.2