CVE-2020-1918

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

In-memory file operations (ie: using fopen on a data URI) did not properly restrict negative seeking, allowing for the reading of memory prior to the in-memory buffer. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-127 CWE-125

Affected software

No affected versions have been published.

Timeline

Published: Mar 10, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2020

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