CVE-2018-8778

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, an attacker controlling the unpacking format (similar to format string vulnerabilities) can trigger a buffer under-read in the String#unpack method, resulting in a massive and controlled information disclosure.

Metrics

CVSS 3.0 7.5/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-134

Affected software

No affected versions have been published.

Timeline

Published: Apr 3, 2018
Last modified: Jun 17, 2026
NVD status: Modified

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