Detections
Analytics

Echo: go.temporal.io/server: security update to 1.28.4

medium Tenable Cloud Security Plugin ID 457635

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-5724)

Solution

Update the go.temporal.io/server library and its related packages to version 1.28.4 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-5724

Plugin Details

Severity: Medium

ID: 457635

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.59

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2026-5724

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.3

Threat Score: 1.7

Threat Vector: CVSS:4.0/E:U

Vector: 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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/29/2026

Vulnerability Publication Date: 4/10/2026

Reference Information

CVE: CVE-2026-5724