{"schemaVersion":3,"id":"USN-8354-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"nginx vulnerabilities\n\nIt was discovered that nginx did not properly validate source addresses in\nthe HTTP/3 QUIC module. A remote attacker could possibly use this issue to\nbypass authorization checks or rate limiting. This issue only affected\nUbuntu 25.04 and Ubuntu 25.10. (CVE-2026-40460)\n\nIt was discovered that nginx contained a use-after-free vulnerability in\nthe ngx_http_ssl_module module when client certificate verification and\nOCSP validation were enabled. A remote attacker could use this issue to\ncause nginx to crash, resulting in a denial of service, or possibly modify\ndata in memory. (CVE-2026-40701)\n\nIt was discovered that nginx did not properly handle certain proxied\nresponses in the ngx_http_charset_module module. A remote attacker could\npossibly use this issue to obtain sensitive information or cause nginx to\ncrash, resulting in a denial of service. (CVE-2026-42934)\n\nIt was discovered that nginx did not properly process certain SCGI and\nuWSGI responses. An attacker able to perform a machine-in-the-middle attack\ncould possibly use this issue to obtain sensitive information or cause\nnginx to crash, resulting in a denial of service. (CVE-2026-42946)\n\nIt was discovered that nginx incorrectly handled certain rewrite rules in\nthe ngx_http_rewrite_module module. A remote attacker could use this issue\nto cause nginx to crash, resulting in a denial of service, or possibly\nexecute arbitrary code. (CVE-2026-9256)","dates":{"published":"2026-06-01T13:52:07.000Z","modified":"2026-06-30T18:16:44.352Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"nginx","name":"nginx","label":"nginx","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/nginx","purlType":"deb","versions":[{"text":"< 1.18.0-6ubuntu14.12","noFixRecorded":false,"fixedIn":null},{"text":"< 1.24.0-2ubuntu7.9","noFixRecorded":false,"fixedIn":null},{"text":"< 1.28.0-6ubuntu1.4","noFixRecorded":false,"fixedIn":null},{"text":"< 1.28.3-2ubuntu1.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.18.0-6ubuntu14.12 | < 1.24.0-2ubuntu7.9 | < 1.28.0-6ubuntu1.4 | < 1.28.3-2ubuntu1.2","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8354-1","label":"ubuntu.com/security/notices/USN-8354-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-9256","label":"ubuntu.com/security/CVE-2026-9256","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-40460","label":"ubuntu.com/security/CVE-2026-40460","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-40701","label":"ubuntu.com/security/CVE-2026-40701","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-42934","label":"ubuntu.com/security/CVE-2026-42934","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-42946","label":"ubuntu.com/security/CVE-2026-42946","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2026-40460","CVE-2026-40701","CVE-2026-42934","CVE-2026-42946","CVE-2026-9256"]},"timeline":[{"kind":"published","date":"2026-06-01T13:52:07.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-30T18:16:44.352Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T07:29:22.541Z","stale":false,"partial":false}}