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  5. CVE-2026-42294

CVE-2026-42294: Argo Vulnerable to Unauthenticated Memory Exhaustion (DoS) in Webhook Interceptor

May 4, 2026 (updated July 21, 2026)

Severity: Medium Component: Webhook Interceptor (server/auth/webhook) Vulnerability Type: Denial of Service (DoS)

References

  • access.redhat.com/security/cve/CVE-2026-42294
  • bugzilla.redhat.com/show_bug.cgi?id=2468443
  • github.com/advisories/GHSA-jcc8-g2q4-9fxq
  • github.com/argoproj/argo-workflows/commit/7abb4de6c3599e2d5d960ba4d5de4cf1df109965
  • github.com/argoproj/argo-workflows/releases/tag/v3.7.14
  • github.com/argoproj/argo-workflows/releases/tag/v4.0.5
  • github.com/argoproj/argo-workflows/security/advisories/GHSA-jcc8-g2q4-9fxq
  • nvd.nist.gov/vuln/detail/CVE-2026-42294
  • security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42294.json

Code Behaviors & Features

Detect and mitigate CVE-2026-42294 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →

Affected versions

All versions starting from 4.0.0 before 4.0.5

Fixed versions

  • 4.0.5

Solution

Upgrade to version 4.0.5 or above.

Impact 7.5 HIGH

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

Learn more about CVSS

Weakness

  • CWE-770: Allocation of Resources Without Limits or Throttling

Source file

go/github.com/argoproj/argo-workflows/v4/CVE-2026-42294.yml

Spotted a mistake? Edit the file on GitLab.

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