CVE-2026-63767

ktransformers Unauthenticated Pickle Deserialization RCE via ZMQ

Published Jul 20, 2026 CVSS 4.0 · 9.3 Critical EPSS 1.1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title ktransformers Unauthenticated Pickle Deserialization RCE via ZMQ
First Time appeared Kvcache-ai
Kvcache-ai ktransformers
Weaknesses CWE-502
CPEs cpe:2.3:a:kvcache-ai:ktransformers:*:*:*:*:*:*:*:*
Vendors & Products Kvcache-ai
Kvcache-ai ktransformers
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Jul 21, 2026, 12:42 PM
Reserved
Jul 18, 2026, 12:34 PM
Status
Deferred
Published
Jul 20, 2026, 8:16 PM
Modified
Oct 24, 2026, 8:10 PM