Parse Server vulnerable to schema poisoning via prototype pollution in deep copy
Impact
An attacker can bypass the default request keyword denylist protection and the class-level permission for adding fields by sending a crafted request that exploits prototype pollution in the deep copy mechanism. This allows injecting fields into class schemas that have field addition locked down, and can cause permanent schema type conflicts that cannot be resolved even with the master key.
Patches
The vulnerable third-party deep copy library has been replaced with a built-in deep clone mechanism that handles prototype properties safely, allowing the existing denylist check to correctly detect and reject the prohibited keyword.
Workarounds
None.
Vulnerability Independence
This vulnerability is not caused by or dependent on a vulnerability in a third-party dependency.
The third-party deepcopy library that was replaced in the fix has no known CVE or security advisory regarding this. The library functions as designed. It is not vulnerable.
The vulnerability is in parse-server's own request processing logic. Parse-server's security-critical keyword denylist check runs after the deep copy step in the request pipeline. The deep copy step strips __proto__ properties as a normal part of its cloning behavior, which means the denylist check never sees the prohibited key. This allows an attacker to bypass both the denylist protection and class-level permissions for adding fields, resulting in schema poisoning.
The root cause is parse-server's reliance on a cloning mechanism that alters the shape of the data before the security check can inspect it. This is a logic flaw in parse-server's security pipeline, not a vulnerability in a dependency. Replacing the cloning mechanism was the fix for parse-server's own bug.
Czego dotyczy
Kliknij technologię, aby zobaczyć wszystkie dotyczące jej podatności.
| Platforma | Paczka | Podatne wersje | Poprawka w wersji |
|---|---|---|---|
| Paczka npm | parse-server | >= 9.0.0, < 9.6.0-alpha.20, < 8.6.44 | 9.6.0-alpha.20, 8.6.44 |
Odnośniki
- https://github.com/parse-community/parse-server/security/advisories/GHSA-9ccr-fpp6-78qf
- https://nvd.nist.gov/vuln/detail/CVE-2026-32878
- https://github.com/parse-community/parse-server/pull/10200
- https://github.com/parse-community/parse-server/pull/10201
- https://github.com/parse-community/parse-server
- Wektor CVSS
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N- Słabość (CWE)
CWE-1321- Platforma
- npm
- Paczka
parse-server- Ujawniono
- 17.03.2026
- Aktualizacja
- 11.10.2026 10:22
Źródła i licencje
OSV / GitHub Advisory Database - GHSA-9ccr-fpp6-78qf - CC BY 4.0
Historia podatności: parse-server
Wszystkie opisane podatności tej paczki (Paczka npm), od najnowszej. Widać, czy to jednorazowa wpadka, czy paczka, której trzeba pilnować.
- Wszystkich wpisów
- 116
- Pierwsza → ostatnia
- 06.2019 06.2026
- Bez poprawki
- 0
- Wykorzystywana w atakach
- 0
Rozkład istotności
- Krytyczna 17
- Wysoka 49
- Średnia 40
- Niska 10
Ujawnienia w latach
- 2019: 2
- 2020: 4
- 2021: 4
- 2022: 12
- 2023: 5
- 2024: 4
- 2025: 6
- 2026: 79
-
Parse Server vulnerable to schema poisoning via prototype pollution in deep copy ten wpis
Dowiedz się, które podatności dotyczą Twojej aplikacji
Po podłączeniu integracji DockRay i włączeniu raportowania oprogramowania DockRay porównuje zgłoszone wersje komponentów ze znanymi podatnościami i powiadamia o potwierdzonych dopasowaniach. Zakres zależy od obsługiwanej technologii i dostępnych biuletynów.