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TI-2026-26303 Aliases CVE-2026-33953

LinkAce's SSRF protection can be bypassed via internal hostname resolution in LinkAce

Priority HIGH 70CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

LinkAce is a self-hosted archive to collect website links. Versions prior to 2.5.3 block direct requests to private IP literals, but still performs server-side requests to internal-only resources when those resources are referenced through an internal hostname. This allows an authenticated user to trigger server-side requests to internal services reachable by the LinkAce server but not directly reachable by an external user. Version 2.5.3 patches the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00279 20th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed LinkAce (Kovah): 2.5.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

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 2.5.32.5.3Patch availableCNA
  • LinkAce VendorKovah Affected before 2.5.3 Fixed in 2.5.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:linkace:linkace:*:*:*:*:*:*:*:*before 2.5.3VulnerableKovah
  • cpe:2.3:a:linkace:linkace:*:*:*:*:*:*:*:* Versions before 2.5.3 Vulnerable ·Kovah

Remediation

  • Fix · CNA LinkAce (Kovah) Fixed in 2.5.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33953

References

Exploit 1

  • 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-2025-33730 LinkAce has a Stored One Click XSS vulnerability CVSS 4.0HIGH 8.4
  • TI-2026-23778 LinkAce affected by SSRF via link creation: NoPrivateIpRule not applied to LinkStoreRequest CVSS 3.1HIGH 7.7
  • TI-2025-36976 LinkAce Vulnerable to Stored XSS on the Audit Page CVSS 3.1HIGH 7.3
  • TI-2024-37395 File Upload Vulnerability Leading to XSS in LinkAce v1.15.5 CVSS 3.1HIGH 7.6
See all 13 →

Sources

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