Improper Authorization in Book Content Service by xxyopen
CVE-2026-123676

6.9MEDIUM

Key Information:

Vendor

Xxyopen

Status
Novel
Vendor
CVE Published:
6 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-123676?

A vulnerability in the Book Content Service by xxyopen allows attackers to manipulate the chapterId argument in the BookServiceImpl.getBookContentAbout function, leading to improper authorization. This vulnerability can be exploited remotely, potentially allowing unauthorized access to sensitive information. A patch has been provided (commit 966c4bdde3521dc0a165d15a2acff66ee33eaaa7) to address the issue, and users are encouraged to apply it to secure their systems.

Affected Version(s)

novel 3.0

novel 3.1

novel 3.2

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-2026-123676 - Proof of Concept

References

https://vuldb.com/vuln/431793
vdb-entrytechnical-description
https://vuldb.com/vuln/431793/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-123676
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
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

carfeii (VulDB User)
.