CVE-2026-30954 LinkAce has a Cross-User Tag/List Attachment IDOR in processTaxonomy()
Authenticated users can attach other users' private tags and lists to their own links due to missing authorization checks in the taxonomy processing method.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-30954?
CVE-2026-30954 is a medium-severity missing authorization vulnerability in Kovah LinkAce, published on 10 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-30954?
It affects 1 product.
Products include Linkace Linkace.
How do I fix CVE-2026-30954?
No fix has been published for CVE-2026-30954 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-30954 being exploited?
There is no known exploitation of CVE-2026-30954 in the wild and no public exploit code.
Other vulnerabilities in Kovah LinkAce
- CVE-2026-27458 LinkAce: Stored XSS in Atom Feed via CDATA Escape in List Description
- CVE-2025-62722 LinkAce: Stored XSS Vulnerability in Link Title Field Through Social Media Sharing Feature
- CVE-2026-33953 LinkAce's SSRF protection can be bypassed via internal hostname resolution in LinkAce
- CVE-2025-53838 LinkAce has a Stored One Click XSS vulnerability
- CVE-2026-30953 LinkAce affected by SSRF via link creation: NoPrivateIpRule not applied to LinkStoreRequest
Sources
Also known as GHSA-vc99-cgj6-wwxh.