CVE-2026-63767CWE-502

ktransformers Unauthenticated Pickle Deserialization RCE via ZMQ

Critical · published July 20, 2026

CVSS v4.0
9.3
EPSS
1%
Percentile
65.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.01116 · 65.8th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2026-07-20T19:13Z
EPSS history
Timeline
  • 20 JUL 19:13Z
    ktransformers Unauthenticated Pickle Deserialization RCE via ZMQ
    cvelistv5