Insecure Default Cache Management Password in Novel-Plus by LinYuanyi
CVE-2026-90940

6.9MEDIUM

Key Information:

Vendor

201206030

Status
Novel-plus
Vendor
CVE Published:
14 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90940?

The novel-plus product, versions up to 5.3.3, contains an insecure default cache-management password in its CacheController.refreshCache endpoint. This flaw enables anonymous attackers to manipulate the cache state by utilizing a hardcoded default password in the URL path. By accessing the cache/refresh endpoint with this known password, attackers can force unnecessary database queries that repopulate the cache, leading to potential disruptions and resource misuse.

Affected Version(s)

novel-plus 0 <= 5.3.3

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-2026-90940 - Proof of Concept

References

https://github.com/LinYuanyi1/cve-request-poc/blob/master...
exploit
https://github.com/201206030/novel-plus/blob/d63c3ee39465...
technical-description
https://github.com/201206030/novel-plus/blob/d63c3ee39465...
technical-description

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
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

Mingsheng Lin
.