Is this vulnerability remotely exploitable?

Yes. An attacker who controls or can influence a redirecting server can trigger the client to follow cross-domain redirects and capture any custom authentication headers that are forwarded, without needing direct access to the victim application.

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

They need the ability to cause the application to make HTTP(S) requests to a domain they control or influence, and then return a redirect response to another host. This could arise through user-controlled URLs, compromised upstream services, DNS hijacking, or malicious third-party endpoints.

What is the safest general fix pattern?

The safest pattern is to avoid sending authentication tokens on requests that may follow cross-domain redirects, and to enforce strict header-stripping or allowlisting when redirects do occur. HTTP clients should treat all auth-related headers as sensitive and avoid forwarding them to different domains by default.

Severity:

HIGH RISK

(7.5)

Information Exposure via Cross-Domain Redirect Header Leakage (CWE-200) in follow-redirects

CVE-2026-40895

Published:

Apr 21, 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:

Information Exposure / Sensitive Data Leakage

CWE:

CWE-200

Impact:

Exposure of Authentication Credentials and API Tokens

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Information Exposure / Sensitive Data Leakage

CWE:

CWE-200

Impact:

Exposure of Authentication Credentials and API Tokens

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Information Exposure via Cross-Domain Redirect Header Leakage (CWE-200) in follow-redirects

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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