{"cve":{"cve_id":"CVE-2026-22184","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00397,"epss_percentile":0.32626,"epss_as_of":"2026-08-26","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.","published_at":"2026-01-07T20:25:19.892000Z","last_modified_at":"2026-07-15T02:18:34.293000Z","cvss_v3_score":8.6,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":4.6,"cvss_v4_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","cvss_v4_severity":"MEDIUM","ssvc_decision":null,"ssvc_exploitation":"poc","ssvc_automatable":true,"ssvc_technical_impact":"total","cwes":["CWE-787","CWE-120"],"nvd_references":["https://seclists.org/fulldisclosure/2026/Jan/3","https://zlib.net/","https://github.com/madler/zlib","https://www.vulncheck.com/advisories/zlib-untgz-global-buffer-overflow-in-tgzfname"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-07-15T15:32:50.779815Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"L","value_label":"Low"},{"metric":"I","name":"Integrity","value":"L","value_label":"Low"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":"4.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"AT","name":"Attack Requirements","value":"N","value_label":"None"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"A","value_label":"Active"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"L","value_label":"Low"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"L","value_label":"Low"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"N","value_label":"None"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"N","value_label":"None"},{"metric":"SA","name":"Availability (Subsequent System)","value":"N","value_label":"None"}]},"affected":[{"vendor_slug":"zlib","vendor_name":"zlib","product_slug":"zlib","product_name":"zlib","version_start":null,"version_start_inclusive":null,"version_end":"1.3.1.2","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:zlib:zlib:*:*:*:*:*:*:*:*"},{"vendor_slug":"zlib-software","vendor_name":"zlib software","product_slug":"zlib","product_name":"zlib","version_start":"0","version_start_inclusive":true,"version_end":"1.3.1.2","version_end_inclusive":true,"cpe23_uri":"cve5:zlib-software:zlib:0:1.3.1.2"}],"exploit_refs":[],"news":[],"references":[{"url":"https://seclists.org/fulldisclosure/2026/Jan/3","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://zlib.net/","source_type":"MISC","tags":[]},{"url":"https://github.com/madler/zlib","source_type":"MISC","tags":[]},{"url":"https://www.vulncheck.com/advisories/zlib-untgz-global-buffer-overflow-in-tgzfname","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2026-01-07T20:25:19.892000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:51:33.019078Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:51:33.019078Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:51:33.019078Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T23:46:59.033383Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-30T03:46:12.618407Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-30T03:46:12.618407Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-30T03:46:12.618407Z","label":"CVSS score revised","source":"cvelistv5"}]}