{"id":"AZL-109638","summary":"CVE-2021-3733 affecting package python-py 1.11.0-1","details":"There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.","modified":"2026-10-23T06:21:25Z","published":"2022-03-10T17:42:59Z","upstream":["CVE-2021-3733"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3733"}],"affected":[{"package":{"name":"python-py","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/python-py"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.11.0-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-109638.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}