CVE-2026-33429
MEDIUM5.3EPSS 0.01%Parse Server has a protected field change detection oracle via LiveQuery watch parameter
Description
### Impact An attacker can subscribe to LiveQuery with a `watch` parameter targeting a protected field. Although the protected field value is properly stripped from event payloads, the presence or absence of update events reveals whether the protected field changed, creating a binary oracle. For boolean protected fields, the timing of change events is equivalent to knowing the field value. ### Patches The `watch` parameter is now validated against protected fields at subscription time, mirroring the existing validation for the `where` clause. Subscriptions that include protected fields in `watch` are rejected with a permission error. Master key connections are exempt. ### Workarounds None.
Affected packages (2)
- Bitnami/parsefrom 0, < 8.6.54, >= 9.0.0, < 9.6.0
- npm/parse-server>= 9.0.0, < 9.6.0-alpha.43
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
References (7)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-33429
- PATCHhttps://github.com/parse-community/parse-server
- WEBhttps://github.com/parse-community/parse-server/commit/0c0a0a5a37ca821d2553119f2cb3be35322eda4b
- WEBhttps://github.com/parse-community/parse-server/commit/c62eacaf38de86913f09240583448360b1cc8e67
- WEBhttps://github.com/parse-community/parse-server/pull/10253
- WEBhttps://github.com/parse-community/parse-server/pull/10254
- WEBhttps://github.com/parse-community/parse-server/security/advisories/GHSA-qpc3-fg4j-8hgm