Vulnerability · Published Aug 20, 2026 · Assigned by GitHub_M

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

High 7.3

In plain English

A high-severity cross-site scripting in LinkAce from Kovah. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)0.4%top 69.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Kovah	LinkAce	< 2.5.7

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

References

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