{"id":"CVE-2021-33880","aliases":["CLSA-2025-1764115973","DEBIAN-CVE-2021-33880","EUVD-2021-0467","GHSA-8ch4-58qp-g3mp","PYSEC-2021-95","UBUNTU-CVE-2021-33880"],"status":"published","title":"Observable Timing Discrepancy in aaugustin websockets library","description":"The aaugustin websockets library before 9.1 for Python has an Observable Timing Discrepancy on servers when HTTP Basic Authentication is enabled with basic_auth_protocol_factory(credentials=...). An attacker may be able to guess a password via a timing 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Party Advisory","fix","web","report"]},{"url":"https://www.oracle.com/security-alerts/cpujan2022.html","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://www.oracle.com/security-alerts/cpuapr2022.html","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33880","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2021-95.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-8ch4-58qp-g3mp","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-33880","tags":["advisory"]},{"url":"https://github.com/aaugustin/websockets","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2021-33880","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-33880","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-33880","description":"The aaugustin websockets 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An attacker may be able to guess a password via a timing attack.","status":"published","published":"2021-06-06T15:15:00Z","modified":"2026-10-17T12:56:20.120395996Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:27.870979Z"},{"id":"CLSA-2025-1764115973","title":"TuxCare security update for websockets (1 CVE)","description":"TuxCare rebuilt websockets to address 1 CVE. Fixed in 8.1.post1+tuxcare.","status":"published","published":"2026-08-04T14:52:09Z","modified":"2026-10-15T09:48:00.688816781Z","updated_at":"2026-11-02T15:43:42.847264Z"},{"id":"PYSEC-2021-95","description":"The aaugustin websockets library before 9.1 for Python has an Observable Timing Discrepancy on servers when HTTP Basic Authentication is enabled with basic_auth_protocol_factory(credentials=...). 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