{"schemaVersion":3,"id":"USN-7927-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"python-urllib3 vulnerabilities\n\nIllia Volochii discovered that urllib3 did not limit the steps in a\ndecompression chain. An attacker could possibly use this issue to cause\nurllib3 to use excessive resources, causing a denial of service.\n(CVE-2025-66418)\n\nRui Xi discovered that urllib3 incorrectly handled highly compressed data.\nAn attacker could possibly use this issue to cause urllib3 to use excessive\nresources, causing a denial of service. This issue only affected Ubuntu\n24.04 LTS, Ubuntu 25.04, and Ubuntu 25.10. (CVE-2025-66471)\n\nFor the brotli encoding, the fix for CVE-2025-66471 requires an additional\nsecurity update in the brotli package.","dates":{"published":"2025-12-11T15:15:13.000Z","modified":"2026-04-27T18:31:45.807Z","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":"python-urllib3","name":"python-urllib3","label":"python-urllib3","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/python-urllib3","purlType":"deb","versions":[{"text":"< 1.25.8-2ubuntu0.4+esm2","noFixRecorded":false,"fixedIn":null},{"text":"< 1.26.5-1~exp1ubuntu0.4","noFixRecorded":false,"fixedIn":null},{"text":"< 2.0.7-1ubuntu0.3","noFixRecorded":false,"fixedIn":null},{"text":"< 2.3.0-3ubuntu0.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.25.8-2ubuntu0.4+esm2 | < 1.26.5-1~exp1ubuntu0.4 | < 2.0.7-1ubuntu0.3 | < 2.3.0-3ubuntu0.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-7927-1","label":"ubuntu.com/security/notices/USN-7927-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-66418","label":"ubuntu.com/security/CVE-2025-66418","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-66471","label":"ubuntu.com/security/CVE-2025-66471","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2025-66418","CVE-2025-66471"],"downstream":[],"duplicates":[],"related":["CVE-2025-66418","CVE-2025-66471"]},"timeline":[{"kind":"published","date":"2025-12-11T15:15:13.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-27T18:31:45.807Z","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":"2026-10-20T23:38:04.668Z","stale":false,"partial":false}}