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CVE-2026-40905— LinkAce: Password Reset Poisoning via X-Forwarded-Host Header Injection Leading to Account Takeover

Quick assessment

Affected
Kovah LinkAce
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LinkAce是Kevin Woblick个人开发者的一个自托管档案库，用于收集您最喜爱的网站的链接。 LinkAce 2.5.4之前版本存在输入验证错误漏洞，该漏洞源于密码重置功能不当信任用户控制的X-Forwarded-Host标头，可能导致攻击者注入受控域名，造成账户接管。

CVSS 8.1 · High EPSS 0.40% · P31
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I. Basic Information for CVE-2026-40905

Vulnerability Information
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Vulnerability Title
LinkAce: Password Reset Poisoning via X-Forwarded-Host Header Injection Leading to Account Takeover
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
LinkAce 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LinkAce是Kevin Woblick个人开发者的一个自托管档案库，用于收集您最喜爱的网站的链接。 LinkAce 2.5.4之前版本存在输入验证错误漏洞，该漏洞源于密码重置功能不当信任用户控制的X-Forwarded-Host标头，可能导致攻击者注入受控域名，造成账户接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Kovah LinkAce < 2.5.4 -

II. Public POCs for CVE-2026-40905

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III. Intelligence Information for CVE-2026-40905

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IV. Related Vulnerabilities

Same product: LinkAce
Same vendor: Kovah
Same weakness: CWE-601

V. Comments for CVE-2026-40905

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