CVE-2026-31872
EPSS 0.05%Parse Server has a protected fields bypass via dot-notation in query and sort
Description
### Impact The `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. This affects both MongoDB and PostgreSQL deployments. ### Patches The 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. ### Workarounds None. ### References - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-r2m8-pxm9-9c4g - Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.6 - Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.32
Affected packages (2)
- Bitnami/parsefrom 0, < 8.6.32, >= 9.0.0, < 9.6.0
- npm/parse-server>= 9.0.0-alpha.1, < 9.6.0-alpha.6
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-31872
- PATCHhttps://github.com/parse-community/parse-server
- WEBhttps://github.com/parse-community/parse-server/releases/tag/8.6.32
- WEBhttps://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.6
- WEBhttps://github.com/parse-community/parse-server/security/advisories/GHSA-r2m8-pxm9-9c4g