Auth bypass in Linkstackorg Linkstack
CVE-2026-7502
A security vulnerability has been detected in LinkStackOrg LinkStack up to 4.8.6. The affected element is the function saveLink of the file app/Http/Controllers/UserController.php of the component Management Endpoint. The manipulation leads to authorization bypass. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The pull request to fix this issue awaits acceptance.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (35.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.002
Affected products
- Linkstackorg Linkstack — versions 4.8.0, 4.8.1, 4.8.2
Weakness classification (CWE)
References
- vuldb.com/vuln/360312 (technical-description, vdb-entry)
- vuldb.com/vuln/360312/cti (signature, permissions-required)
- vuldb.com/submit/801787 (third-party-advisory)
- github.com/LinkStackOrg/LinkStack/pull/975 (issue-tracking, patch)
- github.com/LinkStackOrg/LinkStack/pull/975 (issue-tracking, patch)
- github.com/az10b/security-advisories/blob/main/idor_linkstack.md (exploit)
- github.com/LinkStackOrg/LinkStack/ (product)
Frequently asked questions
- What is CVE-2026-7502?
- CVE-2026-7502 is a medium-severity vulnerability in Linkstackorg Linkstack, classified under Improper Authorization. CVSS score: 5.4/10. Published 2026-04-30.
- How severe is CVE-2026-7502?
- Medium severity. CVSS v3 base score is 5.4 out of 10.