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:

Received

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:

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

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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

(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

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