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CVE-2026-42297: Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernete

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This month
HIGH 8.3UPGRADE

CVE-2026-42297 is a high-severity flaw (CVSS 8.3) affecting argo workflows. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From version 4.0.0 to before version 4.0.5, the Sync Service's ConfigMap-backed provider (server/sync/sync_cm.go) performs zero authorization checks on all CRUD operations (create, read, update, delete). Any authenticated user — including those using fake Bearer tokens — can create, read, update, and delete Kubernetes ConfigMaps contai

Why this priority

  • High severity
  • Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score8.3 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.5% (top 56%)
CISA exploited listNo
WeaknessCWE-862, CWE-425
Published2026-05-09
Last modified2026-07-24
Publisher (CNA): GitHub, Inc. · Vendor: argoproj

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Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

argoproj argo workflows UPGRADE
Affected: >= 4.0.0 and < 4.0.5
Fixed in: 4.0.5
Safe to downgrade to: a release before 4.0.0
1. Check installed version
apt-cache policy argo-workflows || rpm -q argo-workflows || argo-workflows --version
2. UPGRADE to 4.0.5 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade argo-workflows
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade argo-workflows
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 4.0.0 (Debian / Ubuntu)
apt-cache madison argo-workflows sudo apt install argo-workflows=<VERSION_BEFORE_4.0.0> sudo apt-mark hold argo-workflows
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list argo-workflows sudo dnf downgrade argo-workflows-<VERSION_BEFORE_4.0.0> sudo dnf versionlock add argo-workflows
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-2026-42297?

argo workflows: upgrade to 4.0.5. Exact commands for each OS are on this page.

Is CVE-2026-42297 being exploited?

CVE-2026-42297 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-2026-42297 affect?

CVE-2026-42297 affects argo workflows. Severity is high (CVSS 8.3). Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From version 4.0.0 to before version 4.0.5, the Sync Service's ConfigMap-backed provider (server/sync/sync_cm.go) performs zero

How urgent is CVE-2026-42297?

Priority 45/100. High severity; Public exploit reference

Software pages

Kubernetes vulnerabilities

Related CVEs

References

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