{"id":"CVE-2026-33624","summary":"Parse Server: MFA recovery code single-use bypass via concurrent requests","details":"Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.60 and 9.6.0-alpha.54, an attacker who obtains a user's password and a single MFA recovery code can reuse that recovery code an unlimited number of times by sending concurrent login requests. This defeats the single-use design of recovery codes. The attack requires the user's password, a valid recovery code, and the ability to send concurrent requests within milliseconds. This issue has been patched in versions 8.6.60 and 9.6.0-alpha.54.","aliases":["BIT-parse-2026-33624","GHSA-2299-ghjr-6vjp"],"modified":"2026-04-10T05:42:50.575586Z","published":"2026-03-24T18:28:52.114Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33624.json","cwe_ids":["CWE-367"],"cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33624.json"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/commit/5e70094250a36bfcc14ecd49592be2b94fba66ff"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/commit/fc3da35a81d5083b453e8967cabcc880f1a3bd0c"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/pull/10275"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/pull/10276"},{"type":"ADVISORY","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-2299-ghjr-6vjp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33624"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/parse-community/parse-server","events":[{"introduced":"0"},{"fixed":"372a6cc6134c17e4869090a9043b086ddfdcc526"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"8.6.60"}]}},{"type":"GIT","repo":"https://github.com/parse-community/parse-server","events":[{"introduced":"532a461d30a6ed4457839f2caf5f30d5abf51a55"},{"fixed":"e521eb22c551f500e70bf61915677ad3101ef73e"}],"database_specific":{"versions":[{"introduced":"9.0.0"},{"fixed":"9.6.0-alpha.54"}]}}],"versions":["2.0.0","2.0.1","2.0.2","2.0.3","2.0.4","2.0.5","2.0.6","2.0.7","2.0.8","2.1.0","2.1.1","2.1.2","2.1.3","2.1.4","2.1.5","2.1.6","2.2.0","2.2.1","2.2.10","2.2.11","2.2.12","2.2.13","2.2.14","2.2.15","2.2.16","2.2.17","2.2.18","2.2.19","2.2.2","2.2.20","2.2.21","2.2.22","2.2.23","2.2.24","2.2.25","2.2.25-beta.1","2.2.3","2.2.4","2.2.5","2.2.6","2.2.7","2.2.8","2.2.9","2.3.1","2.3.2","2.3.3","2.3.4","2.3.5","2.3.6","2.3.7","2.3.8","2.4.0","2.4.1","2.4.2","2.5.0","2.5.1","2.5.2","2.5.3","2.6.0","2.6.1","2.6.2","2.6.3","2.6.4","2.6.5","2.7.0","2.7.1","2.7.2","2.7.3","2.7.4","2.8.0","2.8.2","3.0.0","3.1.0","3.1.1","3.1.2","3.1.3","3.10.0","3.2.0","3.2.1","3.2.2","3.2.3","3.3.0","3.4.0","3.4.1","3.5.0","3.6.0","3.7.0","3.7.1","3.7.2","3.8.0","3.9.0","4.0.0","4.0.1","4.0.2","4.1.0","4.2.0","4.3.0","4.4.0","4.5.0","5.0.0","5.0.0-alpha.1","5.1.0","5.1.1","5.2.0","5.2.1","5.2.2","5.2.3","5.2.4","5.2.5","5.2.6","5.2.7","5.2.8","5.3.0","5.3.1","5.3.2","5.3.3","5.4.0","6.0.0","6.1.0","6.2.0","6.2.1","6.2.2","6.3.0","6.3.1","6.4.0","7.0.0","7.1.0","7.2.0","7.3.0","7.4.0","8.0.0","8.0.1","8.0.2","8.1.0","8.2.0","8.2.1","8.2.2","8.2.3","8.2.4","8.2.5","8.3.0","8.4.0","8.5.0","8.6.0","8.6.1","8.6.10","8.6.11","8.6.12","8.6.13","8.6.14","8.6.15","8.6.16","8.6.17","8.6.18","8.6.19","8.6.2","8.6.20","8.6.21","8.6.22","8.6.23","8.6.24","8.6.25","8.6.26","8.6.27","8.6.28","8.6.29","8.6.3","8.6.30","8.6.31","8.6.32","8.6.33","8.6.34","8.6.35","8.6.36","8.6.37","8.6.38","8.6.39","8.6.4","8.6.40","8.6.41","8.6.42","8.6.43","8.6.44","8.6.45","8.6.46","8.6.47","8.6.48","8.6.49","8.6.5","8.6.50","8.6.51","8.6.52","8.6.53","8.6.54","8.6.55","8.6.56","8.6.57","8.6.58","8.6.59","8.6.6","8.6.7","8.6.8","8.6.9","9.0.0","9.1.0","9.1.1","9.2.0","9.3.0","9.3.1","9.4.0","9.4.1","9.5.0","9.5.1","9.5.2-alpha.1","9.5.2-alpha.10","9.5.2-alpha.11","9.5.2-alpha.12","9.5.2-alpha.13","9.5.2-alpha.14","9.5.2-alpha.2","9.5.2-alpha.3","9.5.2-alpha.4","9.5.2-alpha.5","9.5.2-alpha.6","9.5.2-alpha.7","9.5.2-alpha.8","9.5.2-alpha.9","9.6.0-alpha.1","9.6.0-alpha.10","9.6.0-alpha.11","9.6.0-alpha.12","9.6.0-alpha.13","9.6.0-alpha.14","9.6.0-alpha.15","9.6.0-alpha.16","9.6.0-alpha.17","9.6.0-alpha.18","9.6.0-alpha.19","9.6.0-alpha.2","9.6.0-alpha.20","9.6.0-alpha.21","9.6.0-alpha.22","9.6.0-alpha.23","9.6.0-alpha.24","9.6.0-alpha.25","9.6.0-alpha.26","9.6.0-alpha.27","9.6.0-alpha.28","9.6.0-alpha.29","9.6.0-alpha.3","9.6.0-alpha.30","9.6.0-alpha.31","9.6.0-alpha.32","9.6.0-alpha.33","9.6.0-alpha.34","9.6.0-alpha.35","9.6.0-alpha.36","9.6.0-alpha.37","9.6.0-alpha.38","9.6.0-alpha.39","9.6.0-alpha.4","9.6.0-alpha.40","9.6.0-alpha.41","9.6.0-alpha.42","9.6.0-alpha.43","9.6.0-alpha.44","9.6.0-alpha.45","9.6.0-alpha.46","9.6.0-alpha.47","9.6.0-alpha.48","9.6.0-alpha.49","9.6.0-alpha.5","9.6.0-alpha.50","9.6.0-alpha.51","9.6.0-alpha.52","9.6.0-alpha.53","9.6.0-alpha.6","9.6.0-alpha.7","9.6.0-alpha.8","9.6.0-alpha.9"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33624.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}