Broken Object-Level Authorization in TheHive by TheHive Project
CVE-2026-63099

7.1HIGH

Key Information:

Vendor

Thehive-project

Status
Thehive
Vendor
CVE Published:
17 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-63099?

TheHive version 4.1.24 contains a broken object-level authorization vulnerability that affects its attachment download functionality. This flaw enables authenticated users to access attachments meant for other organizations. Attackers can exploit this security gap by supplying a content-hash identifier to the attachment download endpoints, allowing unauthorized access and download of sensitive files. The lack of organization-scoped authorization checks in the AttachmentSrv.visible endpoint further exacerbates the issue, permitting arbitrary attachment downloads across organizational boundaries.

Affected Version(s)

TheHive 0 <= 4.1.24

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-63099 - Proof of Concept

References

https://github.com/geo-chen/oss/blob/main/TheHive.md#find...
technical-descriptionexploit
https://www.vulncheck.com/advisories/thehive-broken-objec...
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.