---
title: "CVE-2026-120091: Temporal Server - Command Injection"
description: "Temporal Server 1.31.0 through 1.31.2 contains a command injection caused by building a Kubernetes client from caller-supplied configuration in the k8s compute provider module, letting authenticated namespace users execute commands on the Worker Service host, exploit requires authorization with access to ValidateWorkerDeploymentVersionComputeConfig operation."
url: https://panop.io/threat-heartbeat/CVE-2026-120091/
---

# CVE-2026-120091 Temporal Server - Command Injection

Temporal Server 1.31.0 through 1.31.2 contains a command injection caused by building a Kubernetes client from caller-supplied configuration in the k8s compute provider module, letting authenticated namespace users execute commands on the Worker Service host, exploit requires authorization with access to ValidateWorkerDeploymentVersionComputeConfig operation.

CVSS base score 8.7 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-120091)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/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:X/AU:X/R:X/V:X/RE:X/U:X

Published

2 November 2026

Updated

3 November 2026

Weakness

[CWE-78](https://cwe.mitre.org/data/definitions/78.html)

## Vendor fix

Upgrade to Temporal Server 1.31.3 or later where the compute provider allowlist denies k8s by default, or configure workercontroller.compute\_providers.enabled to exclude k8s.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-120091](https://nvd.nist.gov/vuln/detail/CVE-2026-120091)
- [https://github.com/temporalio/temporal-auto-scaled-workers/pull/165](https://github.com/temporalio/temporal-auto-scaled-workers/pull/165)
- [https://github.com/temporalio/temporal/pull/12843](https://github.com/temporalio/temporal/pull/12843)
- [https://github.com/temporalio/temporal/releases/tag/v1.31.5](https://github.com/temporalio/temporal/releases/tag/v1.31.5)
- [https://github.com/temporalio/temporal/releases/tag/v1.32.2](https://github.com/temporalio/temporal/releases/tag/v1.32.2)
- [https://www.cve.org/CVERecord?id=CVE-2026-89139](https://www.cve.org/CVERecord?id=CVE-2026-89139)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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