Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2026-22184

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.

Published

2026-01-07T21:16:01.563

Last Modified

2026-01-15T14:16:27.047

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

Weaknesses

Type: Primary
CWE-787
Type: Secondary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	zlib	zlib	≤ 1.3.1.2	Yes

References

https://github.com/madler/zlib Product ([email protected])
https://seclists.org/fulldisclosure/2026/Jan/3 Mailing List, Third Party Advisory ([email protected])
https://www.vulncheck.com/advisories/zlib-untgz-global-buffer-overflow-in-tgzfname Third Party Advisory ([email protected])
https://zlib.net/ Product ([email protected])
https://github.com/madler/zlib/issues/1142 Issue Tracking (af854a3a-2127-422b-91ae-364da2661108)