What is CVE-2026-49436?

CVE-2026-49436 is a high-severity vulnerability in Kovah Linkace, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2026-08-20.

How severe is CVE-2026-49436?

High severity. CVSS v3 base score is 7.3 out of 10.

XSS in Kovah Linkace

CVE-2026-49436

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.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.

Affected products

Kovah Linkace — versions < 2.5.7

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-49436?: CVE-2026-49436 is a high-severity vulnerability in Kovah Linkace, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2026-08-20.
How severe is CVE-2026-49436?: High severity. CVSS v3 base score is 7.3 out of 10.