CVE-2026-10839
Received Received - Intake

Open Redirection in Authentication System via X-Forwarded-Host Header

Publication date: 2026-06-17

Last updated on: 2026-06-17

Assigner: Spanish National Cybersecurity Institute, S.A. (INCIBE)

Description
Open redirection vulnerability in the authentication system allows an attacker to use manipulated values in the X-Forwarded-Host header to alter the URLs generated by the application. A successful exploit could redirect authenticated users to malicious sites following login procedures or interaction with the interface, resulting in limited impact on confidentiality and integrity.

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Meta Information

Published
2026-06-17
Last Modified
2026-06-17
Generated
2026-07-08
AI Q&A
2026-06-17
EPSS Evaluated
2026-07-06
NVD
CVE-2026-10839
EUVD
EUVD-2026-37680

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-601 The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.

Attack-Flow Graph

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Executive Summary

This vulnerability is an open redirection issue in the authentication system. It allows an attacker to manipulate the X-Forwarded-Host header to change the URLs generated by the application.

If exploited successfully, authenticated users could be redirected to malicious websites after logging in or interacting with the interface.

Impact Analysis

The impact of this vulnerability is limited on confidentiality and integrity.

However, it could lead to users being redirected to malicious sites, which might result in phishing attacks or other social engineering exploits.

Compliance Impact

The vulnerability is an open redirection issue that allows attackers to redirect authenticated users to malicious sites, which results in limited impact on confidentiality and integrity.

However, there is no specific information provided about how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

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