What’s Vulnerable › Vulnerabilities

CVE-2026-50163: oras-go: Hardlink entry with relative Linkname escapes extract dir via process CWD resolution in `oras-go` tar extraction

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-17 · updated 2026-10-24
• Weakness: CWE-22

Description

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.

Affected products

• oras-project oras-go: before 2.6.2

References

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

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