CVE-2026-40090: Zarf is an Airgap Native Packager Manager for Kubernetes

Routine

HIGH 7.1WATCHLISTUPGRADE

CVE-2026-40090 is a high-severity flaw (CVSS 7.1) affecting zarf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Zarf is an Airgap Native Packager Manager for Kubernetes. Versions 0.23.0 through 0.74.1 contain an arbitrary file write vulnerability in the zarf package inspect sbom and zarf package inspect documentation subcommands. These subcommands output file paths are constructed by joining a user-controlled output directory with the package's Metadata.Name field read directly from the untrusted package's zarf.yaml manifest. Although Metadata.Name is vali

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-04-15
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2026-04-15 04:17 UTCPublished CVE record published
2026-06-17 10:44 UTCUpdated Record last modified

lfprojects zarf UPGRADE

Affected: >= 0.23.0 and < 0.74.2

Fixed in: 0.74.2

Safe to downgrade to: a release before 0.23.0

1. Check installed version

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

2. UPGRADE to 0.74.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zarf

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 0.23.0 (Debian / Ubuntu)

apt-cache madison zarf sudo apt install zarf=<VERSION_BEFORE_0.23.0> sudo apt-mark hold zarf

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

dnf --showduplicates list zarf sudo dnf downgrade zarf-<VERSION_BEFORE_0.23.0> sudo dnf versionlock add zarf

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-2026-40090?

zarf: upgrade to 0.74.2. Exact commands for each OS are on this page.

Is CVE-2026-40090 being exploited?

CVE-2026-40090 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-2026-40090 affect?

CVE-2026-40090 affects zarf. Severity is high (CVSS 7.1). Zarf is an Airgap Native Packager Manager for Kubernetes. Versions 0.23.0 through 0.74.1 contain an arbitrary file write vulnerability in the zarf package inspect sbom and zarf package inspect documentation subcommands. These subcommands ou

How urgent is CVE-2026-40090?

Priority 36/100. High severity; On your watchlist

Software pages

Kubernetes vulnerabilities

Related CVEs

CVE-2026-29064 HIGH 8.2 UPGRADE Zarf is an Airgap Native Packager Manager for Kubernetes

References

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