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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-71981

Cypht < 2.12.2 PHP Object Injection RCE via back_query Parameter

Description

Cypht before 2.12.2 contains a PHP object injection vulnerability that allows authenticated attackers to execute arbitrary operating system commands by supplying a crafted PHP object graph in the back_query GET parameter of the logout handler. Attackers can pass a base64-encoded serialized payload through this parameter, which is decoded and passed directly to unserialize() without an allow-list, signature check, or type restriction, enabling gadget-chain exploitation to achieve remote code execution as the web server process.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

cypht-org cypht

Default version status: affected

  • 0 to < 2.12.2affected
pkg:github/cypht-org/cypht

References