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CVE-2026-103395— LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Visual-Only RPyC Service

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 及之前版本中， 部署模式暴露了一个未认证的 RPyC 服务，且该服务启用了 。攻击者可以访问视觉 RPyC 端口，并通过向 方法传入包含 方法的对象，触发反序列化操作，从而以服务账户权限执行任意代码。

CVSS 9.8 · Critical

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
ModelTC LightLLM ≤ 1.2.0 affected
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I. Basic Information for CVE-2026-103395

Vulnerability Information
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Vulnerability Title
LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Visual-Only RPyC Service
Source: CVE Program / CVE List V5
Vulnerability Description
LightLLM through 1.2.0 visual_only deployments expose an unauthenticated RPyC service with allow_pickle enabled that deserializes attacker-supplied arguments in the remote_infer_images method. Attackers can reach the visual RPyC port and pass objects with __reduce__ methods to execute arbitrary code with service account 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-2026-103395

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-103395

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Vendor Advisories for CVE-2026-103395 (1)

Other References for CVE-2026-103395 (4)

Same Patch Batch · ModelTC · 2026-09-30 · 3 CVEs total

CVE-2026-103270 7.5 HIGH LightLLM through 1.2.0 Missing Authentication on RL Control Routes
CVE-2026-103243 5.8 MEDIUM LightLLM through 1.2.0 Server-Side Request Forgery via multimodal endpoints

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-103395

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