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TI-2026-36594 Aliases CVE-2026-49436

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

Priority HIGH 67CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00367 30th percentileScored 2026-11-07
Fix Fixed LinkAce (Kovah): 2.5.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
KovahLinkAcebefore 2.5.72.5.7Patch availableCNA
  • LinkAce VendorKovah Affected before 2.5.7 Fixed in 2.5.7 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:linkace:linkace:*:*:*:*:*:*:*:*——Kovah
  • cpe:2.3:a:linkace:linkace:*:*:*:*:*:*:*:* Versions — — ·Kovah

Remediation

  • Fix · CNA LinkAce (Kovah) Fixed in 2.5.7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-49436

References

Other 2

  • TI-2026-21865 LinkAce: Stored XSS in Atom Feed via CDATA Escape in List Description CVSS 4.0HIGH 8.7
  • TI-2025-38912 LinkAce: Stored XSS Vulnerability in Link Title Field Through Social Media Sharing Feature CVSS 4.0HIGH 8.7
  • TI-2026-33137 LinkAce - Stored XSS via Unsanitized SSO User's Name Rendered in Admin Audit Log Allows Session Hijacking CVSS 4.0HIGH 8.5
  • TI-2025-33730 LinkAce has a Stored One Click XSS vulnerability CVSS 4.0HIGH 8.4
  • TI-2026-33138 LinkAce: Setup database password newline injection enables pre-auth RCE on uninitialized instances CVSS 3.1HIGH 8.1
  • TI-2026-26303 LinkAce's SSRF protection can be bypassed via internal hostname resolution in LinkAce CVSS 3.1HIGH 8.5
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences