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.
CVE-2021-37914
This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 49% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.5
- EG Score
- 6.5(medium)
- EPSS
- 57.5%
- KEV
- Not listed
Published
August 3, 2021
Last Modified
February 13, 2026
References (4)
- cve@mitrehttps://github.com/argoproj/argo-workflows/issues/6441
- cve@mitrehttps://github.com/argoproj/argo-workflows/pull/6442
- af854a3a-2127-422b-91ae-364da2661108https://github.com/argoproj/argo-workflows/issues/6441
- af854a3a-2127-422b-91ae-364da2661108https://github.com/argoproj/argo-workflows/pull/6442
Affected Packages
(3 across 1 ecosystem)
Go(3)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| github.com/argoproj/argo-workflows | — | — | — |
| github.com/argoproj/argo-workflows/v2 | — | — | — |
| github.com/argoproj/argo-workflows/v3 | — | 3.1.6 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 44× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
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- 2026-05-26 12:47 UTCEG score recompute
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Frequently asked(5)
What is CVE-2021-37914?
When was CVE-2021-37914 disclosed?
Is CVE-2021-37914 actively exploited?
What is the CVSS score of CVE-2021-37914?
How do I remediate CVE-2021-37914?
Dependency Blast Radius
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