Is this vulnerability remotely exploitable?

Yes. If the MCP server is reachable over the network, an attacker can send requests with any arbitrary Bearer token and be treated as authenticated, without needing valid credentials.

What level of access does an attacker need to exploit this?

The attacker only needs network access to the MCP server's HTTP interface. No prior authentication or knowledge of valid tokens is required because any unknown token is accepted.

What is the safest general fix pattern?

Adopt a fail-closed authorization model: treat any unknown, missing, or unverifiable token as invalid and deny access. Ensure token validation includes proper verification against a trusted authority and that no "allow on not found" branches exist in the authorization logic.

Severity:

CRITICAL RISK

(9.1)

Missing Authorization Check (CWE-863) in PraisonAI OAuth Token Validation

CVE-2026-34953

Published:

Apr 3, 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-94

HIGH RISK

HIGH

(8.8)

PHP Code Injection via File Upload (CWE-94) in Aero CMS Admin Post Creation

Remote Code Execution by authenticated users via malicious file upload

May 10, 2026

CWE-94

HIGH RISK

HIGH

(8.8)

Code Injection (CWE-94) via Module Parameters in Evolution CMS

Remote Code Execution by Authenticated Users

May 10, 2026

Vulnerability Type

Category:

Missing Authorization / Authentication Bypass

CWE:

CWE-863

Impact:

Full Unauthorized Access to MCP Server Tools and Agent Capabilities

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Missing Authorization / Authentication Bypass

CWE:

CWE-863

Impact:

Full Unauthorized Access to MCP Server Tools and Agent Capabilities

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 Free Trial

Get Pentest Report

Ship clean & secure code faster

Start Free Trial

Get Pentest Report

Ship clean & secure code faster

Start Free Trial

Get Pentest Report

CodeAnt AI is an offensive and defensive security platform.

Defensive + offensive security.

From first line of code to a pentest
that knows every line of it.

SOC 2 Type II certified | CodeAnt AI is independently audited and compliant with SOC 2 Type II security standards

Ask AI for summary of CodeAnt

Defensive + offensive security.

From first line of code to a pentest
that knows every line of it.

Ask AI for summary of CodeAnt

Defensive + offensive security.

From first line of code to a pentest
that knows every line of it.

Ask AI for summary of CodeAnt

Missing Authorization Check (CWE-863) in PraisonAI OAuth Token Validation

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

(8.8)

PHP Code Injection via File Upload (CWE-94) in Aero CMS Admin Post Creation

HIGH RISK

HIGH

(8.8)

Code Injection (CWE-94) via Module Parameters in Evolution CMS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

Product

Compare

Company

Developers

Legal

Product

Compare

Company

Developers

Legal

Product

Compare

Company

Developers

Legal