{"cve":"CVE-2026-42294","nvd":{"published":"2026-05-09T04:16:24.903","modified":"2026-07-24T21:10:00.143","status":"Modified","description":"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_v4":{"vector":"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","score":8.2},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-770"],"references":["https://github.com/argoproj/argo-workflows/commit/7abb4de6c3599e2d5d960ba4d5de4cf1df109965","https://github.com/argoproj/argo-workflows/releases/tag/v3.7.14","https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5","https://github.com/argoproj/argo-workflows/security/advisories/GHSA-jcc8-g2q4-9fxq","https://access.redhat.com/security/cve/CVE-2026-42294"],"products":["argoproj:argo_workflows"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-42294","score":0.00599,"percentile":0.48694,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-jcc8-g2q4-9fxq","url":"https://osv.dev/vulnerability/GHSA-jcc8-g2q4-9fxq","summary":"Argo Vulnerable to Unauthenticated Memory Exhaustion (DoS) in Webhook Interceptor","modified":"2026-07-21T15:00:42.331188913Z","packages":[{"ecosystem":"Go","name":"github.com/argoproj/argo-workflows/v3","purl":"pkg:golang/github.com/argoproj/argo-workflows/v3","ranges":["<3.7.14"],"fixed":["3.7.14"]},{"ecosystem":"Go","name":"github.com/argoproj/argo-workflows/v4","purl":"pkg:golang/github.com/argoproj/argo-workflows/v4","ranges":[">=4.0.0 <4.0.5"],"fixed":["4.0.5"]}]},{"id":"GO-2026-5462","url":"https://osv.dev/vulnerability/GO-2026-5462","summary":"Argo Vulnerable to Unauthenticated Memory Exhaustion (DoS) in Webhook Interceptor in github.com/argoproj/argo-workflows","modified":"2026-06-25T23:11:21.376309137Z","packages":[{"ecosystem":"Go","name":"github.com/argoproj/argo-workflows","purl":"pkg:golang/github.com/argoproj/argo-workflows","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/argoproj/argo-workflows/v2","purl":"pkg:golang/github.com/argoproj/argo-workflows/v2","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/argoproj/argo-workflows/v3","purl":"pkg:golang/github.com/argoproj/argo-workflows/v3","ranges":["<3.7.14"],"fixed":["3.7.14"]},{"ecosystem":"Go","name":"github.com/argoproj/argo-workflows/v4","purl":"pkg:golang/github.com/argoproj/argo-workflows/v4","ranges":[">=4.0.0 <4.0.5"],"fixed":["4.0.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}