{"id":"CVE-2026-31872","aliases":["BIT-parse-2026-31872","GHSA-r2m8-pxm9-9c4g"],"url":"https://o3.security/vulnerability/CVE-2026-31872","summary":"Parse Server has a protected fields bypass via dot-notation in query and sort","details":"### Impact\n\nThe `protectedFields` class-level permission (CLP) can be bypassed using dot-notation in query WHERE clauses and sort parameters. An attacker can use dot-notation to query or sort by sub-fields of a protected field, enabling a binary oracle attack to enumerate protected field values.\n\nThis affects both MongoDB and PostgreSQL deployments.\n\n### Patches\n\nThe fix ensures that query WHERE clause keys and sort keys are checked against protected fields by extracting the root field from dot-notation paths. For example, a query on `secretObj.apiKey` is now correctly blocked when `secretObj` is a protected field.\n\n### Workarounds\n\nNone.\n\n### References\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-r2m8-pxm9-9c4g\n- Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.6\n- Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.32","published":"2026-03-11T18:02:57.039Z","modified":"2026-10-28T02:31:02.341923051Z","cvss":null,"epss":{"score":0.00367,"percentile":0.2939,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"parse-server","fixedVersion":"9.6.0-alpha.6"},{"ecosystem":"npm","name":"parse-server","fixedVersion":"8.6.32"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/parse-community/parse-server/releases/tag/8.6.32"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31872.json"},{"type":"ADVISORY","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-r2m8-pxm9-9c4g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31872"},{"type":"PACKAGE","url":"https://github.com/parse-community/parse-server"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:31:02.341923051Z"}}