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Vulnerability record · CVE-2026-49436 · published 20 August 2026

CVE-2026-49436: Cross-site scripting vulnerability

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.

7.3 CVSS 3.1 High EPSS 0.37% · top 72.1% CWE-79 · Cross-site scripting Deferred
7.3CVSS 3.1 base score
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
18 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

References

LinkTags
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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Source: NIST National Vulnerability Database (record CVE-2026-49436), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.