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TI-2026-26304 Aliases CVE-2026-33954

LinkAce discloses private notesto unauthorized authenticated users via the web link detail page

Priority MEDIUM 62CWE-285Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-285.

Summary

LinkAce is a self-hosted archive to collect website links. In versions prior to 2.5.3, a private note attached to a non-private link can be disclosed to a different authenticated user via the web interface. The API appears to correctly enforce note visibility, but the web link detail page renders notes without applying equivalent visibility filtering. As a result, an authenticated user who is allowed to view another user's `internal` or `public` link can read that user's `private` notes attached to the link. Version 2.5.3 patches the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00324 25th 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-2026-33954

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-2026-26303 LinkAce's SSRF protection can be bypassed via internal hostname resolution in LinkAce CVSS 3.1HIGH 8.5
  • 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
See all 13 →

Sources

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