CVE-2026-71981
High · 8.8CVSS
8.8
EPSS
1.0%
Published
Sep 1, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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