{"schemaVersion":3,"id":"USN-8210-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"nginx vulnerabilities\n\nIt was discovered that the nginx ngx_mail_auth_http_module module\nincorrectly handled certain requests. An attacker could possibly use this\nissue to cause nginx to crash, resulting in a denial of service.\n(CVE-2026-27651)\n\nIt was discovered that the nginx ngx_http_dav_module module incorrectly\nhandled certain destination URIs. An attacker could use this issue to cause\nnginx to crash, resulting in a denial of service, or possibly modify source\nor destination names outside of the document root. (CVE-2026-27654)\n\nIt was discovered that the nginx ngx_http_mp4_module module incorrectly\nhandled certain MP4 files. An attacker could use this issue to cause nginx\nto crash, resulting in a denial of service, or possibly execute arbitrary\ncode. (CVE-2026-27784, CVE-2026-32647)\n\nIt was discovered that the nginx ngx_mail_smtp_module module incorrectly\nhandled certain CRLF sequences. An attacker could possibly use this issue\nto inject arbitrary SMTP headers. (CVE-2026-28753)\n\nIt was discovered that the nginx ngx_stream_ssl_module module incorrectly\nhandled revoked certificates. This could result in successful TLS\nhandshakes even after an OCSP check identifies a certificate as revoked,\ncontrary to expectations. This issue only affected Ubuntu 24.04 LTS and\nUbuntu 25.10. (CVE-2026-28755)","dates":{"published":"2026-04-27T12:28:20.000Z","modified":"2026-06-30T18:15:55.299Z","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":"< 1.18.0-6ubuntu14.10","noFixRecorded":false,"fixedIn":null},{"text":"< 1.24.0-2ubuntu7.7","noFixRecorded":false,"fixedIn":null},{"text":"< 1.28.0-6ubuntu1.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.18.0-6ubuntu14.10 | < 1.24.0-2ubuntu7.7 | < 1.28.0-6ubuntu1.2","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8210-1","label":"ubuntu.com/security/notices/USN-8210-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-27651","label":"ubuntu.com/security/CVE-2026-27651","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-27654","label":"ubuntu.com/security/CVE-2026-27654","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-27784","label":"ubuntu.com/security/CVE-2026-27784","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-28753","label":"ubuntu.com/security/CVE-2026-28753","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-28755","label":"ubuntu.com/security/CVE-2026-28755","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-32647","label":"ubuntu.com/security/CVE-2026-32647","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2026-27651","CVE-2026-27654","CVE-2026-27784","CVE-2026-28753","CVE-2026-28755","CVE-2026-32647"]},"timeline":[{"kind":"published","date":"2026-04-27T12:28:20.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-30T18:15:55.299Z","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":"2026-10-20T17:06:12.553Z","stale":false,"partial":false}}