CVE-2026-30954 PUBLISHED

LinkAce has a Cross-User Tag/List Attachment IDOR in processTaxonomy()

Assigner: GitHub_M
Reserved: 07.03.2026 Published: 10.03.2026 Updated: 11.03.2026

LinkAce is a self-hosted archive to collect website links. In 2.1.0 and earlier, the processTaxonomy() method in LinkRepository.php allows authenticated users to attach other users' private tags and lists to their own links by passing integer IDs.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score: 5.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	Kovah
Product	LinkAce
Versions	Version <= 2.1.0 is affected

References

https://github.com/Kovah/LinkAce/security/advisories/GHSA-vc99-cgj6-wwxh

Problem Types

CWE-639: Authorization Bypass Through User-Controlled Key CWE