Is this vulnerability remotely exploitable?

Yes. Any attacker with network access to the Parse Server API can potentially exploit this issue by crafting specific Cloud Function invocation requests, without needing valid user credentials, if the target function relies on validators for protection.

Does exploitation require authentication or special privileges?

Not necessarily. The vulnerability specifically allows bypassing validators such as `requireUser` and `requireMaster`. If a Cloud Function is only guarded by such validators and not by other mechanisms (e.g., IP allowlists, gateway-level checks), an unauthenticated caller can attempt to exploit it.

What is the safest general fix pattern?

The safest pattern is to ensure that handler resolution and authorization enforcement are tightly coupled and use the same resolution logic, eliminating any discrepancy introduced by prototype traversal. Additionally, enforce in-function authorization checks for sensitive operations and avoid designs where validators can be skipped due to alternate naming or inheritance paths.

Severity:

CRITICAL RISK

(9.1)

Authorization Bypass via Prototype Chain Traversal (CWE-863) in Parse Server Cloud Functions

CVE-2026-34532

Published:

Mar 31, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Authorization Bypass

CWE:

CWE-863

Impact:

Unauthenticated Access to Protected Cloud Functions

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Authorization Bypass

CWE:

CWE-863

Impact:

Unauthenticated Access to Protected Cloud Functions

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

Detect vulnerable code directly in pull requests, so CVEs are fixed before merge.

Get Started

Ship clean & secure code faster

START 14 DAYS FREE TRIAL

BOOK A DEMO

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Authorization Bypass via Prototype Chain Traversal (CWE-863) in Parse Server Cloud Functions

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare