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    4 vulnerabilities found for temporal by Temporal Technologies, Inc.

    CVE-2026-5724 (GCVE-0-2026-5724)

    Vulnerability from nvd – Published: 2026-04-10 21:06 – Updated: 2026-07-08 19:20
    VLAI
    Title
    Missing Authentication on Streaming gRPC Replication Endpoint
    Summary
    The frontend gRPC server's streaming interceptor chain did not include the authorization interceptor. When a ClaimMapper and Authorizer are configured, unary RPCs enforce authentication and authorization, but the streaming AdminService/StreamWorkflowReplicationMessages endpoint accepted requests without credentials. This endpoint is registered on the same port as WorkflowService 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  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. The fix was applied per release line: it is present in 1.28.4, 1.29.6, 1.30.4, 1.31.2, and 1.32.0 and later releases on each line. Releases 1.31.0 and 1.31.1 do not contain the fix and are affected. Temporal Cloud is not affected.
    Severity
    6.3 (Medium)
    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
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-306 - Missing authentication for critical function
    Assigner
    References
    Impacted products
    Vendor Product Version
    Temporal Technologies, Inc. temporal Affected: 1.24.0 , < 1.28.4 (semver)
    Affected: 1.29.0 , < 1.29.6 (semver)
    Affected: 1.30.0 , < 1.30.4 (semver)
    Affected: 1.31.0 , < 1.31.2 (semver)
    		Create a notification for this product.
    Credits
    Tiberiu Baron of UiPath's security team
    Show details on NVD website
    To clipboard 

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    CVE-2026-5199 (GCVE-0-2026-5199)

    Vulnerability from nvd – Published: 2026-04-01 17:49 – Updated: 2026-04-01 18:24
    VLAI
    Title
    Cross Namespace Access via Batch Operation
    Summary
    A writer role user in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster. Exploitation requires the attacker to know or guess specific victim workflow ID(s) and, for signal operations, signal names. This was due to a bug introduced in Temporal Server v1.29.0 which inadvertently allowed an attacker to control the namespace name value instead of using the server's own trusted name value within the batch activity code. The batch activity validated the namespace ID but did not cross-check the namespace name against the worker's bound namespace, allowing the per-namespace worker's privileged credentials to operate on an arbitrary namespace. Exploitation requires a server configuration where internal components have cross-namespace authorization, such as deployment of the internal-frontend service or equivalent TLS-based authorization for internal identities. This vulnerability also impacted Temporal Cloud when the attacker and victim namespaces were on the same cell, with the same preconditions as self-hosted clusters.
    Severity
    2.3 (Low)
    CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/S:N/AU:Y/R:U/RE:M
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-639 - Authorization bypass through User-Controlled key
    Assigner
    References
    Impacted products
    Vendor Product Version
    Temporal Technologies, Inc. temporal Affected: 1.29.0 , < 1.29.5 (semver)
    Affected: 1.30.0 , < 1.30.3 (semver)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-5724 (GCVE-0-2026-5724)

    Vulnerability from cvelistv5 – Published: 2026-04-10 21:06 – Updated: 2026-07-08 19:20
    VLAI
    Title
    Missing Authentication on Streaming gRPC Replication Endpoint
    Summary
    The frontend gRPC server's streaming interceptor chain did not include the authorization interceptor. When a ClaimMapper and Authorizer are configured, unary RPCs enforce authentication and authorization, but the streaming AdminService/StreamWorkflowReplicationMessages endpoint accepted requests without credentials. This endpoint is registered on the same port as WorkflowService 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  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. The fix was applied per release line: it is present in 1.28.4, 1.29.6, 1.30.4, 1.31.2, and 1.32.0 and later releases on each line. Releases 1.31.0 and 1.31.1 do not contain the fix and are affected. Temporal Cloud is not affected.
    Severity
    6.3 (Medium)
    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
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-306 - Missing authentication for critical function
    Assigner
    References
    Impacted products
    Vendor Product Version
    Temporal Technologies, Inc. temporal Affected: 1.24.0 , < 1.28.4 (semver)
    Affected: 1.29.0 , < 1.29.6 (semver)
    Affected: 1.30.0 , < 1.30.4 (semver)
    Affected: 1.31.0 , < 1.31.2 (semver)
    		Create a notification for this product.
    Credits
    Tiberiu Baron of UiPath's security team
    Show details on NVD website
    To clipboard 

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              "value": "\u003cdiv\u003eThe frontend gRPC server\u0027s streaming interceptor chain did not include the authorization interceptor. When a\u0026nbsp;\u003ccode\u003eClaimMapper\u003c/code\u003e\u0026nbsp;and\u0026nbsp;\u003ccode\u003eAuthorizer\u003c/code\u003e\u0026nbsp;are configured, unary RPCs enforce authentication and authorization, but the streaming\u0026nbsp;\u003ccode\u003eAdminService/StreamWorkflowReplicationMessages\u003c/code\u003e\u0026nbsp;endpoint accepted requests without credentials. This endpoint is registered on the same port as\u0026nbsp;\u003ccode\u003eWorkflowService\u003c/code\u003e\u0026nbsp;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\u0026nbsp; 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.\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003eThe fix was applied per release line: it is present in 1.28.4, 1.29.6, 1.30.4, 1.31.2, and 1.32.0 and later releases on each line. Releases 1.31.0 and 1.31.1 do not contain the fix and are affected.\u003c/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e\u003cdiv\u003eTemporal Cloud is not affected.\u003cspan\u003e\u003c/span\u003e\u003c/div\u003e"
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    CVE-2026-5199 (GCVE-0-2026-5199)

    Vulnerability from cvelistv5 – Published: 2026-04-01 17:49 – Updated: 2026-04-01 18:24
    VLAI
    Title
    Cross Namespace Access via Batch Operation
    Summary
    A writer role user in an attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster. Exploitation requires the attacker to know or guess specific victim workflow ID(s) and, for signal operations, signal names. This was due to a bug introduced in Temporal Server v1.29.0 which inadvertently allowed an attacker to control the namespace name value instead of using the server's own trusted name value within the batch activity code. The batch activity validated the namespace ID but did not cross-check the namespace name against the worker's bound namespace, allowing the per-namespace worker's privileged credentials to operate on an arbitrary namespace. Exploitation requires a server configuration where internal components have cross-namespace authorization, such as deployment of the internal-frontend service or equivalent TLS-based authorization for internal identities. This vulnerability also impacted Temporal Cloud when the attacker and victim namespaces were on the same cell, with the same preconditions as self-hosted clusters.
    Severity
    2.3 (Low)
    CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/S:N/AU:Y/R:U/RE:M
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-639 - Authorization bypass through User-Controlled key
    Assigner
    References
    Impacted products
    Vendor Product Version
    Temporal Technologies, Inc. temporal Affected: 1.29.0 , < 1.29.5 (semver)
    Affected: 1.30.0 , < 1.30.3 (semver)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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