PT-2026-32045 · Grpc+1 · Grpc+3
Tiberiu Baron
·
Published
2026-04-10
·
Updated
2026-04-13
·
CVE-2026-5724
CVSS v4.0
6.3
Medium
| Vector | 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 |
Name of the Vulnerable Software and Affected Versions
Temporal versions (affected versions not specified)
Description
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.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Missing Authentication
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Weakness Enumeration
Related Identifiers
Affected Products
Adminservice
Streamworkflowreplicationmessages
Workflowservice
Grpc