{"id":"CVE-2026-54526","state":"PUBLISHED","title":"Argo Workflows: Incomplete fix for CVE-2026-31892: ArtifactGC.PodSpecPatch bypass of Strict/Secure templateReferencing","description":"Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to 3.7.15 and 4.0.6, the allow-list fix for CVE-2026-31892 is incomplete because workflow/util/merge.go ValidateUserOverrides and SanitizeUserWorkflowSpec walk only the top-level fields of WorkflowSpec via reflection, and WorkflowSpec.ArtifactGC is allow-listed wholesale; the struct behind that field, WorkflowLevelArtifactGC, has a PodSpecPatch sub-field whose contents flow unmodified into util.ApplyPodSpecPatch on the artifact-GC pod, the same sink the original fix closed for WorkflowSpec.PodSpecPatch, so a user submitting a Workflow under templateReferencing: Strict or Secure (against a referenced WorkflowTemplate that declares an output artifact and setting spec.artifactGC.strategy: OnWorkflowCompletion) can still inject an arbitrary strategic merge patch into the artifact-GC pod, including hostPath volumes, privileged: true, arbitrary image and command, and hostNetwork: true, defeating the stated purpose of Strict/Secure reference mode. This issue is fixed in versions 3.7.15 and 4.0.6.","publishedAt":"2026-07-16T19:07:30.804Z","updatedAt":"2026-07-17T13:57:43.413Z","severity":{"score":8.9,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["argoproj argo-workflows"],"affected":[{"vendor":"argoproj","product":"argo-workflows","versions":[{"version":"< 3.7.15","status":"affected"},{"version":">= 4.0.0, < 4.0.6","status":"affected"}]}],"references":["https://github.com/argoproj/argo-workflows/security/advisories/GHSA-48p8-g2fx-3wwm","https://github.com/argoproj/argo-workflows/commit/277e9cef0ad16d7eaaab253573d0695951a65dbd","https://github.com/argoproj/argo-workflows/commit/358cc3968c8f06f1be0967e41df191088db0b662","https://github.com/argoproj/argo-workflows/releases/tag/v3.7.15","https://github.com/argoproj/argo-workflows/releases/tag/v4.0.6"],"weaknesses":["CWE-284"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54526.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54526","state":"PUBLISHED","datePublished":"2026-07-16T19:07:30.804Z","dateUpdated":"2026-07-17T13:57:43.413Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-15T18:40:01.651Z"},"containers":{"cna":{"title":"Argo Workflows: Incomplete fix for CVE-2026-31892: ArtifactGC.PodSpecPatch bypass of Strict/Secure templateReferencing","descriptions":[{"lang":"en","value":"Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to 3.7.15 and 4.0.6, the allow-list fix for CVE-2026-31892 is incomplete because workflow/util/merge.go ValidateUserOverrides and SanitizeUserWorkflowSpec walk only the top-level fields of WorkflowSpec via reflection, and WorkflowSpec.ArtifactGC is allow-listed wholesale; the struct behind that field, WorkflowLevelArtifactGC, has a PodSpecPatch sub-field whose contents flow unmodified into util.ApplyPodSpecPatch on the artifact-GC pod, the same sink the original fix closed for WorkflowSpec.PodSpecPatch, so a user submitting a Workflow under templateReferencing: Strict or Secure (against a referenced WorkflowTemplate that declares an output artifact and setting spec.artifactGC.strategy: OnWorkflowCompletion) can still inject an arbitrary strategic merge patch into the artifact-GC pod, including hostPath volumes, privileged: true, arbitrary image and command, and hostNetwork: true, defeating the stated purpose of Strict/Secure reference mode. This issue is fixed in versions 3.7.15 and 4.0.6."}],"affected":[{"vendor":"argoproj","product":"argo-workflows","versions":[{"version":"< 3.7.15","status":"affected"},{"version":">= 4.0.0, < 4.0.6","status":"affected"}]}],"references":[{"url":"https://github.com/argoproj/argo-workflows/security/advisories/GHSA-48p8-g2fx-3wwm","name":"https://github.com/argoproj/argo-workflows/security/advisories/GHSA-48p8-g2fx-3wwm","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/argoproj/argo-workflows/commit/277e9cef0ad16d7eaaab253573d0695951a65dbd","name":"https://github.com/argoproj/argo-workflows/commit/277e9cef0ad16d7eaaab253573d0695951a65dbd","tags":["x_refsource_MISC"]},{"url":"https://github.com/argoproj/argo-workflows/commit/358cc3968c8f06f1be0967e41df191088db0b662","name":"https://github.com/argoproj/argo-workflows/commit/358cc3968c8f06f1be0967e41df191088db0b662","tags":["x_refsource_MISC"]},{"url":"https://github.com/argoproj/argo-workflows/releases/tag/v3.7.15","name":"https://github.com/argoproj/argo-workflows/releases/tag/v3.7.15","tags":["x_refsource_MISC"]},{"url":"https://github.com/argoproj/argo-workflows/releases/tag/v4.0.6","name":"https://github.com/argoproj/argo-workflows/releases/tag/v4.0.6","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"HIGH","baseScore":8.9,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-284","lang":"en","description":"CWE-284: Improper Access Control","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-16T19:07:30.804Z"},"source":{"advisory":"GHSA-48p8-g2fx-3wwm","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/argoproj/argo-workflows/security/advisories/GHSA-48p8-g2fx-3wwm","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-17T13:57:39.248649Z","id":"CVE-2026-54526","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-17T13:57:43.413Z"}}]}}}