{"id":"CVE-2026-34595","aliases":["BIT-parse-2026-34595","GHSA-mmg8-87c5-jrc2"],"url":"https://o3.security/vulnerability/CVE-2026-34595","summary":"Parse Server: LiveQuery protected-field guard bypass via array-like logical operator value","details":"### Impact\n\nAn authenticated user with `find` class-level permission can bypass the `protectedFields` class-level permission setting on LiveQuery subscriptions. By sending a subscription with a `$or`, `$and`, or `$nor` operator value as a plain object with numeric keys and a `length` property (an \"array-like\" object) instead of an array, the protected-field guard is bypassed. The subscription event firing acts as a binary oracle, allowing the attacker to infer whether a protected field matches a given test value.\n\n### Patches\n\nThe fix validates that `$or`, `$and`, and `$nor` operator values are arrays in the LiveQuery subscription handler, the query depth checker, and the protected-field guard. As defense in depth, the LiveQuery query evaluator also rejects non-array values for these operators.\n\n### Workarounds\n\nThere is no known workaround.","published":"2026-03-31T15:10:06.872Z","modified":"2026-08-12T03:51:22.410343409Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"parse-server","fixedVersion":"9.7.0-alpha.16"},{"ecosystem":"npm","name":"parse-server","fixedVersion":"8.6.70"}],"fix":{"url":"https://github.com/parse-community/parse-server/commit/f63fd1a3fe0a7c1c5fe809f01b0e04759e8c9b98","label":"parse-community/parse-server@f63fd1a"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34595.json"},{"type":"ADVISORY","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-mmg8-87c5-jrc2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34595"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/commit/f63fd1a3fe0a7c1c5fe809f01b0e04759e8c9b98"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/commit/ffad0ec6b971ee0dd9545e1bf1fb34ddebf275c2"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/pull/10350"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/pull/10351"},{"type":"PACKAGE","url":"https://github.com/parse-community/parse-server"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:22.410343409Z"}}