Temporal has an Incorrect Authorization vulnerability

CVE-2025-14987 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

When system.enableCrossNamespaceCommands is enabled (on by default), the Temporal server permits certain workflow task commands (e.g. StartChildWorkflowExecution, SignalExternalWorkflowExecution, RequestCancelExternalWorkflowExecution) to target a different namespace than the namespace authorized at the gRPC boundary. The frontend authorizes RespondWorkflowTaskCompleted based on the outer request namespace, but the history service later resolves and executes the command using the namespace embedded in command attributes without authorizing the caller for that target namespace. This can allow a worker authorized for one namespace to create, signal, or cancel workflows in another namespace.
This issue affects Temporal: through 1.29.1. Fixed in 1.27.4, 1.28.2, 1.29.2.

Basic information

Type
reviewed
Severity
medium
Advisory on GitHub
Open advisory ↗
Repository advisory
—
Source code
Browse source ↗
Published (advisory)
2025-12-30 21:30:33 UTC
Updated
2026-01-02 15:46:18 UTC
GitHub reviewed
2026-01-02 15:46:14 UTC
NVD published
2025-12-30 21:15:43 UTC

EPSS Score

Score Percentile
0.03% 6.58%

CVSS Scores

Base score Version Severity Vector
5.3 4.0 —
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:L)
Low privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:L)
Limited confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:L)
Limited integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:L)
Limited availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:L)
Limited confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:L)
Limited integrity impact on subsequent systems.
Subsequent system availability impact (SA:L)
Limited availability impact on subsequent systems.

Identifiers

Type Value
GHSA GHSA-hmhp-gh8m-c8xp ↗
CVE CVE-2025-14987 ↗

CWEs

CWE id Name
CWE-863 Incorrect Authorization

Affected packages (4)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
go go.temporal.io/server < 1.27.4 1.27.4 —
go go.temporal.io/server >= 1.28.0, < 1.28.2 1.28.2 —
go go.temporal.io/server >= 1.29.0, < 1.29.2 1.29.2 —
go go.temporal.io/server >= 1.29.0-0, < 1.29.0-135.0.0.20251218190115-b292a32bacdf 1.29.0-135.0.0.20251218190115-b292a32bacdf —

References

cvelogic Threat Intelligence