VULNERABILITY INTELLIGENCE
CVE-2026-71981
CVSS score8.7 HIGH
EPSS probability0.97%
CISA KEVNot currently listed
Published2026-09-01
Last modified2026-09-08
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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.
Weakness classification
- CWE-502: Deserialization of Untrusted Data