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CVE-2026-22184

7.8 · HIGH

zlib versions up to and including 1.3.1.2 include a global buffer overflow in the untgz utility located under contrib/untgz.

Published Jan 7, 2026CWE-787EPSS 0.41%

Overview

CVE-2026-22184 is a high-severity vulnerability. It was published on January 7, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/madler/zlibRefseclists.org/fulldisclosure/2026/Jan/3Refwww.vulncheck.com/advisories/zlib-untgz-global-buffer-overflow-in-tgzfnameRefzlib.net/GitHubgithub.com/madler/zlib/issues/1142Refaccess.redhat.com/security/cve/CVE-2026-22184Refbugzilla.redhat.com/show_bug.cgi?id=2427688Refcert-portal.siemens.com/productcert/html/ssa-470355.htmlRefsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22184.json

How CyberStrike helps

Frequently asked questions

What is CVE-2026-22184?

CVE-2026-22184 is a high-severity vulnerability. It was published on January 7, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-22184?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-22184?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-22184?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-22184 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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