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CVE-2026-90919— LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Config Server Pickle Deserialization

Quick assessment

Affected
ModelTC LightLLM
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.

LightLLM 1.2.0 及更早版本中存在一个远程代码执行漏洞，位于配置服务器（Config Server）中未进行身份验证的 WebSocket 端点。该端点直接将客户端发送的第一个数据帧传递给 进行反序列化。攻击者若能访问配置服务器端口，便可发送一个包含 方法的恶意序列化负载，从而以配置服务器进程的权限执行任意代码。

CVSS 9.8 · Critical
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I. Basic Information for CVE-2026-90919

Vulnerability Information
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Vulnerability Title
LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Config Server Pickle Deserialization
Source: CVE Program / CVE List V5
Vulnerability Description
LightLLM through 1.2.0 contains a remote code execution vulnerability in the Config Server's unauthenticated /visual_register WebSocket endpoint that passes the first client frame directly to pickle.loads(). Attackers can reach the Config Server port and send a malicious serialized payload with a __reduce__ method to execute arbitrary code with Config Server process privileges.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
ModelTC LightLLM 0 ~ 1.2.0 -

II. Public POCs for CVE-2026-90919

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III. Intelligence Information for CVE-2026-90919

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Vendor Advisories for CVE-2026-90919 (1)

Proof of Concept for CVE-2026-90919 (1)

Other References for CVE-2026-90919 (2)

IV. Related Vulnerabilities

Same product: LightLLM
Same vendor: ModelTC
Same weakness: CWE-502

V. Comments for CVE-2026-90919

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