What is CVE-2026-30954?

CVE-2026-30954 is a medium-severity vulnerability in Kovah Linkace, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-03-10.

How severe is CVE-2026-30954?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Kovah Linkace

CVE-2026-30954

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.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-03-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (18.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Kovah Linkace — versions <= 2.1.0
Linkace

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

github.com/Kovah/LinkAce/security/advisories/GHSA-vc99-cgj6-wwxh (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-30954?: CVE-2026-30954 is a medium-severity vulnerability in Kovah Linkace, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-03-10.
How severe is CVE-2026-30954?: Medium severity. CVSS v3 base score is 4.3 out of 10.