CVE-2026-42294

8.2 highEPSS 0.6%

High (8.2) in argoproj argo workflows. EPSS 0.6% chance of exploitation in the next 30 days. Fixed in github.com/argoproj/argo-workflows/v3 3.7.14.

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to versions 3.7.14 and 4.0.5, the Webhook Interceptor loads the entire request body into memory before authenticating the request or verifying its signature. This occurs on the /api/v1/events/ endpoint, which is publicly accessible (albeit intended for webhooks). An attacker can send a request with an extremely large body (e.g., multiple gigabytes), causing the Argo Server to allocate excessive memory, potentially leading to an Out-Of-Memory (OOM) crash and denial of service. This issue has been patched in versions 3.7.14 and 4.0.5.

Severity

CVSS 4.0

8.2 high

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 48% of CVEs (scores of 2026-10-31)
CWE: CWE-770
Published: 2026-05-09
Modified: 2026-07-24
Record from: the NVD, synced 2026-10-19

Affected

argoproj:argo_workflows

Packages (OSV)

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-jcc8-g2q4-9fxq	Go	github.com/argoproj/argo-workflows/v3	<3.7.14	3.7.14
GHSA-jcc8-g2q4-9fxq	Go	github.com/argoproj/argo-workflows/v4	>=4.0.0 <4.0.5	4.0.5
GO-2026-5462	Go	github.com/argoproj/argo-workflows	all versions	no fix published
GO-2026-5462	Go	github.com/argoproj/argo-workflows/v2	all versions	no fix published
GO-2026-5462	Go	github.com/argoproj/argo-workflows/v3	<3.7.14	3.7.14
GO-2026-5462	Go	github.com/argoproj/argo-workflows/v4	>=4.0.0 <4.0.5	4.0.5

References

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