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CVE-2026-49436— LinkAce vulnerable to stored XSS via 'javascript:' URI in Bulk Link API

Quick assessment

Affected
Kovah LinkAce
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kevin Woblick LinkAce是Kevin Woblick个人开发者的一个自托管的链接存档网站，用于收集您喜爱的网站链接。 Kevin Woblick LinkAce 2.5.7之前版本存在跨站脚本漏洞，该漏洞源于Bulk Link API端点对URL格式验证不足，可能导致认证用户存储javascript: URI，触发跨站脚本攻击，窃取cookie和会话令牌。

CVSS 7.3 · High EPSS 0.37% · P29

Affected Version Matrix 1

VendorProduct Version RangeStatus
Kovah LinkAce < 2.5.7 affected
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I. Basic Information for CVE-2026-49436

Vulnerability Information
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Vulnerability Title
LinkAce vulnerable to stored XSS via 'javascript:' URI in Bulk Link API
Source: CVE Program / CVE List V5
Vulnerability Description
LinkAce is a self-hosted archive to collect website links. Prior to version 2.5.7, the Bulk Link API endpoint (`POST /api/v2/bulk/links`) accepts URLs without any format validation, allowing an authenticated user to store a `javascript:` URI. The stored URI is later rendered verbatim as an `href` in Blade templates, and clicking it executes arbitrary JavaScript in the victim's browser — exfiltrating cookies and session tokens. Version 2.5.7 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Kevin Woblick LinkAce 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kevin Woblick LinkAce是Kevin Woblick个人开发者的一个自托管的链接存档网站，用于收集您喜爱的网站链接。 Kevin Woblick LinkAce 2.5.7之前版本存在跨站脚本漏洞，该漏洞源于Bulk Link API端点对URL格式验证不足，可能导致认证用户存储javascript: URI，触发跨站脚本攻击，窃取cookie和会话令牌。
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 < 2.5.7 -

II. Public POCs for CVE-2026-49436

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6595 chars
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III. Intelligence Information for CVE-2026-49436

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Patches & Fixes for CVE-2026-49436 (1)

Vendor Advisories for CVE-2026-49436 (1)

IV. Related Vulnerabilities

Same product: LinkAce
Same vendor: Kovah
Same weakness: CWE-79

V. Comments for CVE-2026-49436

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