---
cve: "CVE-2026-34595"
severity: "MEDIUM"
cvss: 5.3
epss: "25%"
vendor: "parse-community"
kev: false
exploited: false
published: "2026-03-31 16:16:34"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T22:23:14+02:00"
---

# CVE-2026-34595

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.70 and 9.7.0-alpha.18, an 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. This issue has been patched in versions 8.6.70 and 9.7.0-alpha.18.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 83e794919635ff8b6c86bed8b640222d1c973e03 (Commit)
- 84ca53352fd2d91322e1a03c0c275709668a02b7 (Commit)

## Referenzen

- <https://github.com/parse-community/parse-server/security/advisories/GHSA-mmg8-87c5-jrc2>
- <https://github.com/parse-community/parse-server/pull/10350>
- <https://github.com/parse-community/parse-server/pull/10351>
- <https://github.com/parse-community/parse-server/commit/f63fd1a3fe0a7c1c5fe809f01b0e04759e8c9b98>
- <https://github.com/parse-community/parse-server/commit/ffad0ec6b971ee0dd9545e1bf1fb34ddebf275c2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-34595) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_