LinkAce vulnerable to stored XSS via 'javascript:' URI in Bulk Link API

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.

Scores

EPSS (exploitation in 30 days)

0.37% · top 69% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.3.

Weakness

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• Kovah · LinkAce

  • affected < 2.5.7

References (2)

• https://github.com/Kovah/LinkAce/security/advisories/GHSA-6r73-pchm-4m39 (opens in a new tab)x_refsource_CONFIRMexploit
• https://github.com/Kovah/LinkAce/commit/642ac520347205a8277668bcae269bdc21223eae (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-49436](https://trackcve.app/badge/CVE-2026-49436.svg)](https://trackcve.app/cve/CVE-2026-49436)

Record last updated 21 Aug 2026, 15:47 UTC.