CVE-2026-49436 HIGH

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

Vendor Kovah

Product LinkAce

Weakness CWE-79 · XSS

Published August 20, 2026

Last update August 21, 2026

View on NVD All CVEs

CVSS base score

7.3/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction Required

Confidentiality High

Integrity High

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 20, 2026 CVE published

August 21, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-49436 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/79.html AskarLabs — CWE-79 write-up Cross-Site Scripting

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04Related CVE

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