CVE-2018-6334

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CVSS 3.1

9.8 critical

EPSS

2%p79

Published

Dec 31, 2018 (Dec 31, 2018)

Modified

Jun 17, 2026

Description

Multipart-file uploads call variables to be improperly registered in the global scope. In cases where variables are not declared explicitly before being used this can lead to unexpected behavior. This affects all supported versions of HHVM prior to the patch (3.25.1, 3.24.5, and 3.21.9 and below).

Vendors: facebook
Products: hhvm
Weakness: CWE-621, CWE-20
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (1.9%)

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