CVE-2026-50163: high-severity vulnerability in oras-project oras-go
oras-go: Hardlink entry with relative Linkname escapes extract dir via process CWD resolution in `oras-go` tar extraction
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.4%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Affected products
oras-project · oras-goRelated CVEs — oras-project oras-go
In the same product, most dangerous first.
CVE-2026-85731HIGHoras-go: Arbitrary file write outside file.Store root via symlink-chain bypass in tar extraction (pushDir)EPSS 0.7%CVE-2026-50162MEDIUMoras-go: file store write outside workingDir via symlink traversalEPSS 0.4%CVE-2026-85732MEDIUMoras-go: Blind SSRF via unvalidated Link header URL in pagination allows internal network probingEPSS 0.4%CVE-2026-50151HIGHoras-go: credential forwarding via unvalidated Location header in blob uploadEPSS 0.4%CVE-2026-48978LOWoras-go: Malicious registry can hijack Bearer token realm to exfiltrate credentials and refresh tokensEPSS 0.2%