{"id":"CVE-2026-33624","aliases":["BIT-parse-2026-33624","GHSA-2299-ghjr-6vjp"],"url":"https://o3.security/vulnerability/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.","published":"2026-03-24T18:28:52.114Z","modified":"2026-08-12T03:51:32.387505584Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"parse-server","fixedVersion":"9.6.0-alpha.54"},{"ecosystem":"npm","name":"parse-server","fixedVersion":"8.6.60"}],"fix":{"url":"https://github.com/parse-community/parse-server/commit/5e70094250a36bfcc14ecd49592be2b94fba66ff","label":"parse-community/parse-server@5e70094"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33624.json"},{"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"},{"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:32.387505584Z"}}