Authorization Flaw in REBUILD Product by Unknown Vendor
CVE-2026-102249

6.9MEDIUM

Key Information:

Vendor

Unknown Vendor

Status
Rebuild
Vendor
CVE Published:
29 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-102249?

A significant security flaw has been identified in the REBUILD application, specifically in the /commons/file-editor-save functionality. This vulnerability arises from a missing authorization check in the processing of the url/fileKey argument, which may allow an unauthorized user to execute actions remotely. The flaw can be exploited without requiring any direct interaction with the application and has already been made public, heightening the risk of potential attacks. Despite attempts to notify the vendor regarding this issue, there has been no response or remedial action taken.

Affected Version(s)

REBUILD 4.4.0

REBUILD 4.4.1

REBUILD 4.4.2

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-2026-102249 - Proof of Concept

References

https://vuldb.com/vuln/411151
vdb-entrytechnical-description
https://vuldb.com/vuln/411151/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-102249
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

asants (VulDB User)
VulDB CNA Team
.