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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Temporal Technologies | temporal | 1.24.0 – < 1.28.4, 1.29.0 – < 1.29.6, 1.30.0 – < 1.30.4, 1.31.0 – < 1.31.2 | 1.28.4 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | tdbg +4 | 1.30.4-r0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
tibrn/CVE-2026-5724 ★ 0 · Apr 18, 2026
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | go.temporal.io/server | < 1.28.4 | 1.28.4 | GHSA-q98v-9f9w-f49q |
| Go | go.temporal.io/server | >= 1.29.0-135.0, < 1.29.6 | 1.29.6 | GHSA-q98v-9f9w-f49q |
| Go | go.temporal.io/server | >= 1.30.0-143.0, < 1.30.4 | 1.30.4 | GHSA-q98v-9f9w-f49q |
| Go | go.temporal.io/server | < 1.28.4 · >= 1.29.0-135.0, < 1.29.6 · >= 1.30.0-143.0, < 1.30.4 | 1.28.4, 1.29.6, 1.30.4 | GO-2026-5578 |
Advisories 1
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026