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CVE-2016-5772

CRITICAL severity · CVSS 9.8 · Double free
9.8CVSS CRITICAL

Summary

Double free vulnerability in the php_wddx_process_data function in wddx.c in the WDDX extension in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via crafted XML data that is mishandled in a wddx_deserialize call.

Impact & exploitability

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)16%

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

Affected products we track (3)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: http://github.com/php/php-src/commit/a44c89e8af7c2410f4bfc5e097be2a5d0639a60c?w=1 ↗

Last checked: Wed, 10 Jun 2026 22:18:30 UTC