{"id":"CVE-2026-22184","title":"zlib versions up to and including 1.3.1.2 include a global buffer overflow in the untgz utility located under contrib/untgz","summary":"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 compressi…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-787","CWE-787","CWE-120"],"vendor":"zlib","product":"zlib","affected":["zlib <= 1.3.1.2"],"published":"2026-01-07","updated":"2026-06-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-22184","references":[{"url":"https://github.com/madler/zlib","label":"disclosure@vulncheck.com"},{"url":"https://seclists.org/fulldisclosure/2026/Jan/3","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/zlib-untgz-global-buffer-overflow-in-tgzfname","label":"disclosure@vulncheck.com"},{"url":"https://zlib.net/","label":"disclosure@vulncheck.com"},{"url":"https://github.com/madler/zlib/issues/1142","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/security/cve/CVE-2026-22184","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2427688","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22184.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"tags":["nvd"],"epss":0.00424,"epssPercentile":0.36231,"ingestedAt":"2026-06-30T13:26:50.199Z","slug":"CVE-2026-22184","body":"## Overview\n\nzlib 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.\n\n## Affected\n\n- `zlib <= 1.3.1.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}