Unauthenticated PHP Object Injection in Château Theme by WordPress
CVE-2026-40757

8.1HIGH

Key Information:

Vendor

WordPress
Status
Château
Vendor
CVE Published:
17 June 2026

What is CVE-2026-40757?

The Château Theme for WordPress versions up to 1.2.1 is susceptible to an unauthenticated PHP Object Injection vulnerability. This flaw allows attackers to send specially crafted requests that may lead to arbitrary code execution, potentially compromising the security of affected websites. Proper validation and sanitization of user input are critical to mitigate this risk effectively.

Affected Version(s)

Château <= 1.2.1

References

https://patchstack.com/database/wordpress/theme/chateau/v...
vdb-entry

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Denver Jackson | Patchstack Bug Bounty Program
.