{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42294", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-26T12:13:55.551Z", "datePublished": "2026-05-09T03:45:48.180Z", "dateUpdated": "2026-05-11T15:47:21.683Z"}, "containers": {"cna": {"title": "Argo Workflows: Unauthenticated Memory Exhaustion (DoS) in Webhook Interceptor", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "vectorString": "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", "version": "4.0"}}], "references": [{"name": "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-jcc8-g2q4-9fxq", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-jcc8-g2q4-9fxq"}, {"name": "https://github.com/argoproj/argo-workflows/commit/7abb4de6c3599e2d5d960ba4d5de4cf1df109965", "tags": ["x_refsource_MISC"], "url": "https://github.com/argoproj/argo-workflows/commit/7abb4de6c3599e2d5d960ba4d5de4cf1df109965"}, {"name": "https://github.com/argoproj/argo-workflows/releases/tag/v3.7.14", "tags": ["x_refsource_MISC"], "url": "https://github.com/argoproj/argo-workflows/releases/tag/v3.7.14"}, {"name": "https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5", "tags": ["x_refsource_MISC"], "url": "https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5"}], "affected": [{"vendor": "argoproj", "product": "argo-workflows", "versions": [{"version": "< 3.7.14", "status": "affected"}, {"version": ">= 4.0.0, < 4.0.5", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-09T03:45:48.180Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-jcc8-g2q4-9fxq", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-jcc8-g2q4-9fxq", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-11T15:47:11.506111Z", "id": "CVE-2026-42294", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-11T15:47:21.683Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42294", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-26T12:13:55.551Z", "datePublished": "2026-05-09T03:45:48.180Z", "dateUpdated": "2026-05-11T15:47:21.683Z"}, "containers": {"cna": {"title": "Argo Workflows: Unauthenticated Memory Exhaustion (DoS) in Webhook Interceptor", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "vectorString": "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", "version": "4.0"}}], "references": [{"name": "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-jcc8-g2q4-9fxq", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-jcc8-g2q4-9fxq"}, {"name": "https://github.com/argoproj/argo-workflows/commit/7abb4de6c3599e2d5d960ba4d5de4cf1df109965", "tags": ["x_refsource_MISC"], "url": "https://github.com/argoproj/argo-workflows/commit/7abb4de6c3599e2d5d960ba4d5de4cf1df109965"}, {"name": "https://github.com/argoproj/argo-workflows/releases/tag/v3.7.14", "tags": ["x_refsource_MISC"], "url": "https://github.com/argoproj/argo-workflows/releases/tag/v3.7.14"}, {"name": "https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5", "tags": ["x_refsource_MISC"], "url": "https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5"}], "affected": [{"vendor": "argoproj", "product": "argo-workflows", "versions": [{"version": "< 3.7.14", "status": "affected"}, {"version": ">= 4.0.0, < 4.0.5", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-09T03:45:48.180Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-jcc8-g2q4-9fxq", "discovery": "UNKNOWN"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-42294", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-11T15:47:11.506111Z"}}}], "references": [{"url": "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-jcc8-g2q4-9fxq", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-11T15:46:55.942Z"}}]}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-42294", "lastModified": "2026-05-12T15:37:14.030", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-09T04:16:24.903", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/argoproj/argo-workflows/commit/7abb4de6c3599e2d5d960ba4d5de4cf1df109965"}, {"source": "security-advisories@github.com", "url": "https://github.com/argoproj/argo-workflows/releases/tag/v3.7.14"}, {"source": "security-advisories@github.com", "url": "https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5"}, {"source": "security-advisories@github.com", "url": "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-jcc8-g2q4-9fxq"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-jcc8-g2q4-9fxq"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Undergoing Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.7.14)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,4.0.5)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "argo-workflows", "source": "cna", "vendor": "argoproj"}, "product": "argo-workflows", "vendor": "argoproj"}], "created": "2026-05-09T05:30:15.793965+00:00", "updated": "2026-05-09T05:30:16.031202+00:00", "vendors": ["argoproj", "argoproj$PRODUCT$argo-workflows"]}