CVE-2026-26210

KTransformers through 0.5.3 contains an unsafe deserialization vulnerability in the balance_serve backend mode where the scheduler RPC server binds a ZMQ ROUTER socket to all interfaces with no authentication and deserializes incoming messages using pickle.loads() without validation. Attackers can send a crafted pickle payload to the exposed ZMQ socket to execute arbitrary code on the server with the privileges of the ktransformers process.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://chocapikk.com/posts/2026/ktransformers-pickle-rce/	Exploit Mitigation Third Party Advisory
https://github.com/kvcache-ai/ktransformers/pull/1944	Issue Tracking Patch
https://www.vulncheck.com/advisories/ktransformers-unsafe-deserialization-rce-via-balance-serve	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:kvcache-ai:ktransformers:*:*:*:*:*:*:*:*

History

05 May 2026, 14:43

Type	Values Removed	Values Added
References	~~() https://chocapikk.com/posts/2026/ktransformers-pickle-rce/ -~~	() https://chocapikk.com/posts/2026/ktransformers-pickle-rce/ - Exploit, Mitigation, Third Party Advisory
References	~~() https://github.com/kvcache-ai/ktransformers/pull/1944 -~~	() https://github.com/kvcache-ai/ktransformers/pull/1944 - Issue Tracking, Patch
References	~~() https://www.vulncheck.com/advisories/ktransformers-unsafe-deserialization-rce-via-balance-serve -~~	() https://www.vulncheck.com/advisories/ktransformers-unsafe-deserialization-rce-via-balance-serve - Third Party Advisory
CPE		cpe:2.3:a:kvcache-ai:ktransformers::::::::
First Time		Kvcache-ai ktransformers Kvcache-ai

23 Apr 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-23 22:16

Updated : 2026-05-05 14:43

NVD link : CVE-2026-26210

Mitre link : CVE-2026-26210

CVE.ORG link : CVE-2026-26210

JSON object : View

Products Affected

kvcache-ai

ktransformers

CWE

CWE-502

Deserialization of Untrusted Data

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