CVE-2026-22184

HighCVSS 7.8/10Last modified Sep 1, 2026

Description

zlib versions up to and including 1.3.1.2 include a global buffer overflow in the untgz utility located under contrib/untgz. The vulnerability is limited to the standalone demonstration utility and does not affect the core zlib compression library. The flaw occurs when a user executes the untgz command with an excessively long archive name supplied via the command line, leading to an out-of-bounds write in a fixed-size global buffer.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787 CWE-120

Affected software

No affected versions have been published.

Timeline

Published: Jan 7, 2026
Last modified: Sep 1, 2026
NVD status: Modified

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