CVE-2026-40905
Received Received - Intake
Password Reset Poisoning in LinkAce Allows Account Takeover

Publication date: 2026-04-21

Last updated on: 2026-04-21

Assigner: GitHub, Inc.

Description
LinkAce is a self-hosted archive to collect website links. Prior to 2.5.4, a password reset poisoning vulnerability was identified in the application due to improper trust of user-controlled HTTP headers. The application uses the X-Forwarded-Host header when generating password reset URLs. By manipulating this header during a password reset request, an attacker can inject an attacker-controlled domain into the reset link sent via email. As a result, the victim receives a password reset email containing a malicious link pointing to an attacker-controlled domain. When the victim clicks the link, the password reset token is transmitted to the attacker-controlled server. An attacker can capture this token and use it to reset the victim’s password, leading to full account takeover. This vulnerability is fixed in 2.5.4.
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Meta Information
Published
2026-04-21
Last Modified
2026-04-21
Generated
2026-06-16
AI Q&A
2026-04-22
EPSS Evaluated
2026-06-15
NVD
CVE-2026-40905
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linkace linkace to 2.5.4 (exc)
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.
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Executive Summary

This vulnerability exists in LinkAce versions prior to 2.5.4 and involves a password reset poisoning issue caused by improper trust of user-controlled HTTP headers.

Specifically, the application uses the X-Forwarded-Host header when generating password reset URLs. An attacker can manipulate this header during a password reset request to inject a malicious domain into the reset link sent via email.

As a result, the victim receives a password reset email containing a link pointing to an attacker-controlled domain. When the victim clicks this link, the password reset token is sent to the attacker, who can then use it to reset the victim's password and take over their account.

Impact Analysis

This vulnerability can lead to a full account takeover by an attacker.

By capturing the password reset token through a maliciously crafted reset link, an attacker can reset the victim's password and gain unauthorized access to their account.

This compromises the confidentiality and integrity of the victim's account and any data or services accessible through it.

Mitigation Strategies

The vulnerability is fixed in LinkAce version 2.5.4. The immediate step to mitigate this vulnerability is to upgrade your LinkAce installation to version 2.5.4 or later.

Compliance Impact

This vulnerability allows an attacker to perform a password reset poisoning attack, leading to full account takeover by capturing password reset tokens.

Such unauthorized access to user accounts can result in exposure of personal or sensitive data, which may violate data protection regulations like GDPR or HIPAA.

Therefore, if exploited, this vulnerability could lead to non-compliance with standards requiring protection of user data and secure authentication mechanisms.

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