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CVE-2026-26210— KTransformers Unsafe Deserialization RCE via balance_serve

Quick assessment

Affected
kvcache-ai ktransformers
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ktransformers是kvcache.ai开源的一个CPU-GPU异构大模型推理与微调框架。 KTransformers 0.5.3及之前版本存在代码问题漏洞，该漏洞源于balance_serve后端模式中的不安全反序列化，其中调度器RPC服务器将ZMQ ROUTER套接字绑定到所有接口且无身份验证，并使用pickle.loads()反序列化传入消息，允许攻击者发送特制pickle有效载荷执行任意代码。

CVSS 9.8 · Critical EPSS 1.04% · P63

Affected Version Matrix 1

VendorProduct Version RangeStatus
kvcache-ai ktransformers ≤ 0.5.3 affected
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I. Basic Information for CVE-2026-26210

Vulnerability Information
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Vulnerability Title
KTransformers Unsafe Deserialization RCE via balance_serve
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
ktransformers 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ktransformers是kvcache.ai开源的一个CPU-GPU异构大模型推理与微调框架。 KTransformers 0.5.3及之前版本存在代码问题漏洞，该漏洞源于balance_serve后端模式中的不安全反序列化，其中调度器RPC服务器将ZMQ ROUTER套接字绑定到所有接口且无身份验证，并使用pickle.loads()反序列化传入消息，允许攻击者发送特制pickle有效载荷执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
kvcache-ai ktransformers 0 ~ 0.5.3 -

II. Public POCs for CVE-2026-26210

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III. Intelligence Information for CVE-2026-26210

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Patches & Fixes for CVE-2026-26210 (1)

Security Blog Posts for CVE-2026-26210 (1)

IV. Related Vulnerabilities

Same product: ktransformers
Same vendor: kvcache-ai
Same weakness: CWE-502

V. Comments for CVE-2026-26210

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