Is this vulnerability remotely exploitable?

Yes. Any attacker who can establish a TLS session with a vulnerable endpoint and supply a crafted certificate chain can potentially exploit this issue, provided they hold a legitimate leaf certificate from a trusted CA.

What level of access does an attacker need?

The attacker needs: - The ability to obtain a standard end-entity certificate from a CA that the application trusts, and - Network access to interact with the TLS service or client that relies on the affected verification path. No local system access is required beyond normal network connectivity to the target.

What is the safest general fix pattern?

The safest pattern is to ensure that all certificate validation is performed by a well-tested, centralized routine that: - Verifies the signature on every certificate in the chain, including the leaf, - Enforces Basic Constraints and key usage, - Confirms anchoring to an appropriate trust store, - Performs explicit hostname or identity checks at the application boundary. Where possible, use the native wolfSSL handshake verification path rather than custom or compatibility-layer implementations.

Severity:

HIGH RISK

(8.1)

Improper Certificate Validation (CWE-295) in wolfSSL OpenSSL Compatibility Layer

CVE-2026-5501

Published:

Apr 9, 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-74;CWE-89

HIGH RISK

HIGH

(7.3)

SQL Injection via Unsanitized ID Parameter (CWE-89) in Pharmacy Sales and Inventory System /ajax.php

Database Compromise and Data Integrity Loss

April 27, 2026

CWE-863

HIGH RISK

HIGH

(8.5)

Incorrect Authorization (CWE-863) in OpenClaw chat.send Session Management

Privilege Escalation and Unauthorized Session Control

April 27, 2026

Vulnerability Type

Category:

Improper Certificate Validation

CWE:

CWE-295

Impact:

Authentication Bypass and TLS Endpoint Impersonation

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Certificate Validation

CWE:

CWE-295

Impact:

Authentication Bypass and TLS Endpoint Impersonation

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

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Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Improper Certificate Validation (CWE-295) in wolfSSL OpenSSL Compatibility Layer

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)

SQL Injection via Unsanitized ID Parameter (CWE-89) in Pharmacy Sales and Inventory System /ajax.php

HIGH RISK

HIGH

(8.5)

Incorrect Authorization (CWE-863) in OpenClaw chat.send Session Management

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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