CVE-2026-42294Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jul 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
argoproj argo_workflows argoproj:argo_workflows | before 3.7.14; from 4.0.0 before 4.0.5 | NVD |
References
- https://github.com/argoproj/argo-workflows/commit/7abb4de6c3599e2d5d960ba4d5de4cf1df109965patch
- https://github.com/argoproj/argo-workflows/releases/tag/v3.7.14release-notes
- https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5release-notes
- https://github.com/argoproj/argo-workflows/security/advisories/GHSA-jcc8-g2q4-9fxqexploit, vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-42294
- https://bugzilla.redhat.com/show_bug.cgi?id=2468443
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42294.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.