CVE-2026-5724
mediumpriority · track · 10OT risk · elevatedEPSS 0.005 · 44 %ileexploit · PoCEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.9–6.3
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (1)
Public proof-of-concept and weaponised exploit code.
- tibrn/CVE-2026-5724tibrn/CVE-2026-5724PoC · poc_in_github
affected products (7)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- GHSA-q98v-9f9w-f49qTemporal does not enforce authentication and authorization for the streaming AdminService/StreamWorkflowReplicationMessages endpoint2026-04-10ghsa · osvUS
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. Temporal Cloud is not affected.
- GO-2026-5578Temporal does not enforce authentication and authorization for the streaming AdminService/StreamWorkflowReplicationMessages endpoint in go.temporal.io/server2026-06-25vendor · osvUS
Temporal does not enforce authentication and authorization for the streaming AdminService/StreamWorkflowReplicationMessages endpoint in go.temporal.io/server
also known as (5)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (13)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2026-5724cnnvd
- https://github.com/temporalio/temporal/releasesPatchcnnvd
- https://github.com/temporalio/temporal/releases/tag/v1.28.4cnnvd
- https://github.com/temporalio/temporal/releases/tag/v1.29.6cnnvd
- https://github.com/temporalio/temporal/releases/tag/v1.30.4cnnvd
- https://github.com/temporalio/temporal/releases/tag/v1.28.4enisa_euvd
- https://github.com/temporalio/temporal/releases/tag/v1.29.6enisa_euvd
- https://github.com/temporalio/temporal/releases/tag/v1.30.4enisa_euvd
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