{"id":"CVE-2020-8492","revision":"6153f5104a374497adfeae76d12a98a1","records":[{"revision":"6153f5104a374497adfeae76d12a98a1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2020-8492","aliases":[],"title":"Python 2.7 through 2.7.17, 3.5 through 3.5.9, 3.6 through 3.6.10, 3.7 through 3.7.6, and 3.8 through 3.8.1 allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client because of urllib.request.Abst…","description":"Python 2.7 through 2.7.17, 3.5 through 3.5.9, 3.6 through 3.6.10, 3.7 through 3.7.6, and 3.8 through 3.8.1 allows an HTTP server to conduct Regular Expression Denial of Service (ReDoS) attacks against a client because of urllib.request.AbstractBasicAuthHandler catastrophic backtracking.","state":0,"publishedAt":"2020-01-30T00:00:00+00:00","modifiedAt":"2026-10-14T08:40:24.67+00:00","affected":[{"ecosystem":"Vendor product","name":"n/a","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"n/a\",\n                    \"product\": \"n/a\",\n                    \"versions\": [\n                        {\n                            \"version\": \"n/a\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://bugs.python.org/issue39503","https://python-security.readthedocs.io/vuln/urllib-basic-auth-regex.html","https://github.com/python/cpython/pull/18284","https://security.netapp.com/advisory/ntap-20200221-0001/","http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00003.html","https://usn.ubuntu.com/4333-1/","https://usn.ubuntu.com/4333-2/","https://security.gentoo.org/glsa/202005-09","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APGWEMYZIY5VHLCSZ3HD67PA5Z2UQFGH/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7WOKDEXLYW5UQ4S7PA7E37IITOC7C56J/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UESGYI5XDAHJBATEZN3MHNDUBDH47AS6/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A5NSAX4SC3V64PGZUPH7PRDLSON34Q5A/","https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html","https://lists.apache.org/thread.html/rdb31a608dd6758c6093fd645aea3fbf022dd25b37109b6aaea5bc0b5%40%3Ccommits.cassandra.apache.org%3E","https://lists.apache.org/thread.html/rfec113c733162b39633fd86a2d0f34bf42ac35f711b3ec1835c774da%40%3Ccommits.cassandra.apache.org%3E","https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2020-8492","license":"CVE Program Terms of Use","key":"cve-program:CVE-2020-8492","identifiers":["CVE-2020-8492"]},"retained":false,"historicalAffected":[]}],"coverage":[]}