CVE-2026-5724
Missing Authentication on Streaming gRPC Replication Endpoint
- Published
- Updated
- Reserved
- Assigned by
- Temporal
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. 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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| TemporalCNA (assigner) | 4.0 | Medium6.3 | 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 |
| NVDNVD · Awaiting Analysis | 4.0 | Medium6.3 | 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 |
- EPSS (exploitation in 30 days)
- 0.53% · top 55% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.3.
Weakness
Affected products
Temporal Technologies, Inc. · temporal
- affected 1.24.0 – < 1.28.4
- affected 1.29.0 – < 1.29.6
- affected 1.30.0 – < 1.30.4
- affected 1.31.0 – < 1.31.2
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogo.temporal.io/serverGHSA-q98v-9f9w-f49q (opens in a new tab)
References (4)
- https://github.com/temporalio/temporal/releases/tag/v1.29.6 (opens in a new tab)patch
- https://github.com/temporalio/temporal/releases/tag/v1.30.4 (opens in a new tab)patch
- https://github.com/temporalio/temporal/releases/tag/v1.28.4 (opens in a new tab)patch
- https://github.com/temporalio/temporal/releases/tag/v1.31.2 (opens in a new tab)patch
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-q98v-9f9w-f49q (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-5724)Record last updated .