{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-5724", "assignerOrgId": "61241ed8-fa44-4f23-92db-b8c443751968", "state": "PUBLISHED", "assignerShortName": "Temporal", "dateReserved": "2026-04-06T21:59:05.129Z", "datePublished": "2026-04-10T21:06:31.788Z", "dateUpdated": "2026-04-10T21:22:30.134Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "61241ed8-fa44-4f23-92db-b8c443751968", "shortName": "Temporal", "dateUpdated": "2026-04-10T21:22:30.134Z"}, "title": "Missing Authentication on Streaming gRPC Replication Endpoint", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-306", "description": "CWE-306 Missing authentication for critical function", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-115", "descriptions": [{"lang": "en", "value": "CAPEC-115 Authentication Bypass"}]}], "affected": [{"vendor": "Temporal Technologies, Inc.", "product": "temporal", "collectionURL": "https://github.com", "packageName": "temporal", "repo": "https://github.com/temporalio/temporal", "versions": [{"status": "affected", "version": "1.24.0", "lessThanOrEqual": "1.30.3", "versionType": "semver"}, {"status": "affected", "version": "1.24.0", "lessThanOrEqual": "1.29.5", "versionType": "semver"}, {"status": "affected", "version": "1.24.0", "lessThanOrEqual": "1.28.3", "versionType": "semver"}], "defaultStatus": "affected"}], "descriptions": [{"lang": "en", "value": "The frontend gRPC server's streaming interceptor chain did not include the authorization interceptor. When a\u00a0ClaimMapper\u00a0and\u00a0Authorizer\u00a0are configured, unary RPCs enforce authentication and authorization, but the streaming\u00a0AdminService/StreamWorkflowReplicationMessages\u00a0endpoint accepted requests without credentials. This endpoint is registered on the same port as\u00a0WorkflowService\u00a0and cannot be disabled independently. An attacker with network access to the frontend port could open the replication stream without authentication. Data exfiltration is possible, but\u00a0 only when a configured replication target is correctly configured and the attacker has knowledge of the cluster configuration, as the history service validates cluster IDs and peer membership before returning replication data.\n\n\n\n\nTemporal Cloud is not affected.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<div>The frontend gRPC server's streaming interceptor chain did not include the authorization interceptor. When a&nbsp;<code>ClaimMapper</code>&nbsp;and&nbsp;<code>Authorizer</code>&nbsp;are configured, unary RPCs enforce authentication and authorization, but the streaming&nbsp;<code>AdminService/StreamWorkflowReplicationMessages</code>&nbsp;endpoint accepted requests without credentials. This endpoint is registered on the same port as&nbsp;<code>WorkflowService</code>&nbsp;and cannot be disabled independently. An attacker with network access to the frontend port could open the replication stream without authentication. Data exfiltration is possible, but&nbsp; only when a configured replication target is correctly configured and the attacker has knowledge of the cluster configuration, as the history service validates cluster IDs and peer membership before returning replication data.</div><div><br></div><div>Temporal Cloud is not affected.<span></span></div>"}]}], "references": [{"url": "https://github.com/temporalio/temporal/releases/tag/v1.29.6", "tags": ["patch"]}, {"url": "https://github.com/temporalio/temporal/releases/tag/v1.30.4", "tags": ["patch"]}, {"url": "https://github.com/temporalio/temporal/releases/tag/v1.28.4", "tags": ["patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "subConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NEGLIGIBLE", "Automatable": "NO", "Recovery": "USER", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "LOW", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 6.3, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:L/SI:N/SA:N/S:N/AU:N/R:U/RE:L"}}], "credits": [{"lang": "en", "value": "Tiberiu Baron of UiPath's security team", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.1"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "The frontend gRPC server's streaming interceptor chain did not include the authorization interceptor. When a\u00a0ClaimMapper\u00a0and\u00a0Authorizer\u00a0are configured, unary RPCs enforce authentication and authorization, but the streaming\u00a0AdminService/StreamWorkflowReplicationMessages\u00a0endpoint accepted requests without credentials. This endpoint is registered on the same port as\u00a0WorkflowService\u00a0and cannot be disabled independently. An attacker with network access to the frontend port could open the replication stream without authentication. Data exfiltration is possible, but\u00a0 only when a configured replication target is correctly configured and the attacker has knowledge of the cluster configuration, as the history service validates cluster IDs and peer membership before returning replication data.\n\n\n\n\nTemporal Cloud is not affected."}], "id": "CVE-2026-5724", "lastModified": "2026-04-10T21:16:28.497", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NO", "Recovery": "USER", "Safety": "NEGLIGIBLE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.3, "baseSeverity": "MEDIUM", "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": "LOW", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:L/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:N/AU:N/R:U/V:X/RE:L/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "LOW"}, "source": "security@temporal.io", "type": "Secondary"}]}, "published": "2026-04-10T21:16:28.497", "references": [{"source": "security@temporal.io", "url": "https://github.com/temporalio/temporal/releases/tag/v1.28.4"}, {"source": "security@temporal.io", "url": "https://github.com/temporalio/temporal/releases/tag/v1.29.6"}, {"source": "security@temporal.io", "url": "https://github.com/temporalio/temporal/releases/tag/v1.30.4"}], "sourceIdentifier": "security@temporal.io", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-306"}], "source": "security@temporal.io", "type": "Secondary"}]}

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