CVE-2021-21272: ORAS is open source software which enables a way to push OCI Artifacts to OCI Conformant registries

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HIGH 7.7UPGRADE

CVE-2021-21272 is a high-severity flaw (CVSS 7.7) affecting oras. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ORAS is open source software which enables a way to push OCI Artifacts to OCI Conformant registries. ORAS is both a CLI for initial testing and a Go Module. In ORAS from version 0.4.0 and before version 0.9.0, there is a "zip-slip" vulnerability. The directory support feature allows the downloaded gzipped tarballs to be automatically extracted to the user-specified directory where the tarball can have symbolic links and hard links. A well-crafted

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.7 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-22, CWE-59
Published	2021-01-25
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: deislabs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-01-25 19:15 UTCPublished CVE record published
2026-06-17 03:35 UTCUpdated Record last modified

deislabs oras UPGRADE

Affected: >= 0.4.0 and < 0.9.0

Fixed in: 0.9.0

Safe to downgrade to: a release before 0.4.0

1. Check installed version

apt-cache policy oras || rpm -q oras || oras --version

2. UPGRADE to 0.9.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade oras

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade oras

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.4.0 (Debian / Ubuntu)

apt-cache madison oras sudo apt install oras=<VERSION_BEFORE_0.4.0> sudo apt-mark hold oras

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list oras sudo dnf downgrade oras-<VERSION_BEFORE_0.4.0> sudo dnf versionlock add oras

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-21272?

oras: upgrade to 0.9.0. Exact commands for each OS are on this page.

Is CVE-2021-21272 being exploited?

CVE-2021-21272 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-21272 affect?

CVE-2021-21272 affects oras. Severity is high (CVSS 7.7). ORAS is open source software which enables a way to push OCI Artifacts to OCI Conformant registries. ORAS is both a CLI for initial testing and a Go Module. In ORAS from version 0.4.0 and before version 0.9.0, there is a "zip-slip" vulnerab

How urgent is CVE-2021-21272?

Priority 45/100. High severity

Related CVEs

CVE-2026-50151 HIGH 7.5 UPGRADE oras-go is a Go library for managing OCI artifacts

References

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