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Vulnerability record · CVE-2016-1000004 · published 19 February 2020

CVE-2016-1000004: Facebook hhvm insufficient verification of data authenticity vulnerability

Facebook · Hhvm

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).

9.8 CVSS 3.1 Critical EPSS 0.68% · top 49.4% CWE-345 · Insufficient verification of data authenticity
9.8CVSS 3.1 base score, v2 7.5
0.68%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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).

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/facebook/hhvm/commit/8e7266fef1f329b805b37f32c9ad0090215ab269 PatchThird Party Advisory
https://www.facebook.com/security/advisories/cve-2016-1000004 Third Party Advisory
https://github.com/facebook/hhvm/commit/8e7266fef1f329b805b37f32c9ad0090215ab269 PatchThird Party Advisory
https://www.facebook.com/security/advisories/cve-2016-1000004 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2016-1000004), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.