CVE-2026-31801: zot is ancontainer image/artifact registry based on the Open Container Initiative Distribution Specification

Routine

HIGH 7.7UPGRADE

CVE-2026-31801 is a high-severity flaw (CVSS 7.7) affecting zot. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

zot is ancontainer image/artifact registry based on the Open Container Initiative Distribution Specification. From 1.3.0 to 2.1.14, zot’s dist-spec authorization middleware infers the required action for PUT /v2/{name}/manifests/{reference} as create by default, and only switches to update when the tag already exists and reference != "latest". As a result, when latest already exists, a user who is allowed to create (but not allowed to update) can

Why this priority

High severity
Public exploit reference

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	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-03-10
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2026-03-10 21:16 UTCPublished CVE record published
2026-06-17 10:34 UTCUpdated Record last modified

zotregistry zot UPGRADE

Affected: >= 1.3.0 and < 2.1.15

Fixed in: 2.1.15

Safe to downgrade to: a release before 1.3.0

1. Check installed version

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

2. UPGRADE to 2.1.15 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zot

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 1.3.0 (Debian / Ubuntu)

apt-cache madison zot sudo apt install zot=<VERSION_BEFORE_1.3.0> sudo apt-mark hold zot

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

dnf --showduplicates list zot sudo dnf downgrade zot-<VERSION_BEFORE_1.3.0> sudo dnf versionlock add zot

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-2026-31801?

zot: upgrade to 2.1.15. Exact commands for each OS are on this page.

Is CVE-2026-31801 being exploited?

CVE-2026-31801 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-2026-31801 affect?

CVE-2026-31801 affects zot. Severity is high (CVSS 7.7). zot is ancontainer image/artifact registry based on the Open Container Initiative Distribution Specification. From 1.3.0 to 2.1.14, zot’s dist-spec authorization middleware infers the required action for PUT /v2/{name}/manifests/{reference}

How urgent is CVE-2026-31801?

Priority 35/100. High severity; Public exploit reference

Related CVEs

CVE-2025-23208 HIGH 7.3 UPGRADE zot is a production-ready vendor-neutral OCI image registry
CVE-2024-39897 MEDIUM 4.3 UPGRADE zot is an OCI image registry

References

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