{"id":"CVE-2021-46823","aliases":["GHSA-qfr5-wjpw-q4c4","GHSA-r8wq-qrxc-hmcm","PYSEC-2026-912"],"url":"https://o3.security/vulnerability/CVE-2021-46823","summary":"Denial of Service in python-ldap","details":"python-ldap before 3.4.0 is vulnerable to a denial of service when ldap.schema is used for untrusted schema definitions, because of a regular expression denial of service (ReDoS) flaw in the LDAP schema parser. By sending crafted regex input, a remote authenticated attacker could exploit this vulnerability to cause a denial of service condition.","published":"2022-06-18T16:15:08.173Z","modified":"2026-07-09T12:33:23.669948Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"python-ldap","fixedVersion":"3.4.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/221507"},{"type":"ADVISORY","url":"https://github.com/python-ldap/python-ldap/security/advisories/GHSA-r8wq-qrxc-hmcm"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T12:33:23.669948Z"}}