CVE-2026-54526: Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernete

Q: How do I fix CVE-2026-54526?

argo workflows: upgrade to 3.7.15, 4.0.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-54526 being exploited?

CVE-2026-54526 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-54526 affect?

CVE-2026-54526 affects argo workflows. Severity is critical (CVSS 9.9). Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to 3.7.15 and 4.0.6, the allow-list fix for CVE-2026-31892 is incomplete because workflow/util/merge.go ValidateUserOverr

Q: How urgent is CVE-2026-54526?

Priority 51/100. Critical severity; Public exploit reference

This month

CRITICAL 9.9UPGRADE

CVE-2026-54526 is a critical-severity flaw (CVSS 9.9) 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. Prior to 3.7.15 and 4.0.6, the allow-list fix for CVE-2026-31892 is incomplete because workflow/util/merge.go ValidateUserOverrides and SanitizeUserWorkflowSpec walk only the top-level fields of WorkflowSpec via reflection, and WorkflowSpec.ArtifactGC is allow-listed wholesale; the struct behind that field, WorkflowLevelArtifactGC, has

Why this priority

Critical severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 55%)
CISA exploited list	No
Weakness	CWE-284
Published	2026-07-16
Last modified	2026-10-24

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

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-16 19:16 UTCPublished CVE record published
2026-10-24 20:10 UTCUpdated Record last modified

argoproj argo workflows UPGRADE

Affected: < 3.7.15 · >= 4.0.0 and < 4.0.6

Fixed in: 3.7.15, 4.0.6

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 3.7.15 (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.

Exact fixes by distribution

Go · github.com/argoproj/argo-workflows/v4 · FIXED · 4.0.6 · vulnerable: >= 4.0.0, < 4.0.6 · source

go get github.com/argoproj/argo-workflows/v4@v4.0.6 go list -m github.com/argoproj/argo-workflows/v4

Go · github.com/argoproj/argo-workflows/v3 · FIXED · 3.7.15 · vulnerable: < 3.7.15 · source

go get github.com/argoproj/argo-workflows/v3@v3.7.15 go list -m github.com/argoproj/argo-workflows/v3

Go · github.com/argoproj/argo-workflows · NO FIX YET · vulnerable: <= 2.5.3-rc4 · source

Fedora 46 · conda · FIXED · 26.9.4-2.fc46 · FEDORA-2026-09931756f1 · source

sudo dnf upgrade --advisory=FEDORA-2026-09931756f1

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/argoproj/argo-workflows/security/advisories/GHSA-48p8-g2fx-3wwm

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-2026-54526?

argo workflows: upgrade to 3.7.15, 4.0.6. Exact commands for each OS are on this page.

Is CVE-2026-54526 being exploited?

CVE-2026-54526 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-2026-54526 affect?

CVE-2026-54526 affects argo workflows. Severity is critical (CVSS 9.9). Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to 3.7.15 and 4.0.6, the allow-list fix for CVE-2026-31892 is incomplete because workflow/util/merge.go ValidateUserOverr

How urgent is CVE-2026-54526?

Priority 51/100. Critical severity; Public exploit reference

Software pages

Kubernetes vulnerabilities

References

← Back to latest CVEs