What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-20 · updated 2026-10-18
• Weakness: CWE-79

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.

Affected products

• Kovah LinkAce: before 2.5.7

References

• https://github.com/Kovah/LinkAce/commit/642ac520347205a8277668bcae269bdc21223eae
• https://github.com/Kovah/LinkAce/security/advisories/GHSA-6r73-pchm-4m39
• https://github.com/Kovah/LinkAce/security/advisories/GHSA-6r73-pchm-4m39

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