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CVE-2026-33953— LinkAce's SSRF protection can be bypassed via internal hostname resolution in LinkAce

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 2.5.3之前版本存在代码问题漏洞，该漏洞源于仍会对内部主机名引用的内部资源执行服务器端请求，可能导致经过身份验证的用户触发对LinkAce服务器可达但外部用户不可达的内部服务的服务器端请求。

CVSS 8.5 · High EPSS 0.33% · P24

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2026-33953

Vulnerability Information
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Vulnerability Title
LinkAce's SSRF protection can be bypassed via internal hostname resolution in LinkAce
Source: CVE Program / CVE List V5
Vulnerability Description
LinkAce is a self-hosted archive to collect website links. Versions prior to 2.5.3 block direct requests to private IP literals, but still performs server-side requests to internal-only resources when those resources are referenced through an internal hostname. This allows an authenticated user to trigger server-side requests to internal services reachable by the LinkAce server but not directly reachable by an external user. Version 2.5.3 patches the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
LinkAce 代码问题漏洞
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 2.5.3之前版本存在代码问题漏洞，该漏洞源于仍会对内部主机名引用的内部资源执行服务器端请求，可能导致经过身份验证的用户触发对LinkAce服务器可达但外部用户不可达的内部服务的服务器端请求。
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 < 2.5.3 -

II. Public POCs for CVE-2026-33953

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III. Intelligence Information for CVE-2026-33953

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Vendor Advisories for CVE-2026-33953 (1)

IV. Related Vulnerabilities

Same product: LinkAce
Same vendor: Kovah
Same weakness: CWE-918

V. Comments for CVE-2026-33953

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