Auth bypass in Thehive-Project Thehive
CVE-2026-63099
TheHive through 4.1.24 contains a broken object-level authorization vulnerability in the attachment download endpoints that allows any authenticated user to access attachments belonging to other organizations by supplying a content-hash identifier. Attackers can exploit the missing organization-scoped authorization check in AttachmentSrv.visible, which is implemented as a pass-through traversal, to download arbitrary attachments.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (27.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Thehive-Project Thehive — versions 0
Weakness classification (CWE)
References
- Researcher Disclosure (technical-description, exploit)
- www.vulncheck.com/advisories/thehive-broken-object-level-authorization-via-atta… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-63099?
- CVE-2026-63099 is a medium-severity vulnerability in Thehive-Project Thehive, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-07-17.
- How severe is CVE-2026-63099?
- Medium severity. CVSS v3 base score is 6.5 out of 10.