Improper NUL Byte Neutralization Vulnerability in cPanel by cPanel, Inc.
CVE-2026-105475

8.7HIGH

Key Information:

Vendor

Webpros

Status
Cpanel
Vendor
CVE Published:
2 November 2026

What is CVE-2026-105475?

An improper neutralization of a NUL byte in cPanel allows remote attackers to exploit the system and gain unauthorized access to sensitive information, specifically reading any mail account's calendar and contact data. This vulnerability could lead to significant privacy breaches, enabling unauthorized individuals to view confidential user data without detection.

Affected Version(s)

cPanel 0 < 11.138.0.19

cPanel 0 < 11.136.0.51

cPanel 0 < 11.134.0.67

References

https://support.cpanel.net/hc/en-us/articles/443565911324...

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

rz1027 (rz1027)
.