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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.

LinkAce 是一款自托管的网页链接归档工具，用于收集和整理网站链接。在 2.5.7 版本之前，其批量链接 API 端点（ ）未对输入的 URL 进行任何格式校验，导致经过身份验证的用户可以存储一个 协议的 URI。该存储的 URI 随后会在 Blade 模板中被原样渲染为 属性，当受害者点击该链接时，将在其浏览器中执行任意 JavaScript 代码，从而窃取 cookie 和会话令牌。该漏洞已在版本 2.5.7 中修复。

CVSS 7.3 · High EPSS 0.26% · P17

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

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
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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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