CVE-2026-63767: Kvcache-Ai Ktransformers

Critical severity, CVSS 9.8. EPSS: 1.1% chance of exploitation in the next 30 days.

ktransformers through 0.6.3, fixed in commit def0f93, contains an unauthenticated pickle deserialization vulnerability that allows remote attackers to execute arbitrary commands by sending crafted pickle payloads to the SchedulerServer ZMQ ROUTER socket bound to all interfaces. Attackers can exploit malicious __reduce__ methods embedded in crafted pickle payloads to execute arbitrary shell commands as the server process.

Affected products

• Kvcache-Ai Ktransformers: up to and including 0.6.3

Published 2026-07-20. Last modified 2026-07-23.