CVE-2026-48797— MCP Tool Shop Backpropagate 信息泄露漏洞
一分钟漏洞结论
影响对象
mcp-tool-shop-org backpropagate
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
MCP Tool Shop Backpropagate是MCP Tool Shop组织的一个大语言模型微调平台。 backpropagate 1.1.0版本和1.1.1版本存在安全漏洞，该漏洞源于Reflex web UI认证缺失，可能导致攻击者读取上传的数据集、触发任意训练运行、推送至HuggingFace Hub以及造成磁盘填满拒绝服务。
影响版本矩阵 2
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| mcp-tool-shop-org | @mcptoolshop/backpropagate | >= 1.1.0, < 1.2.0 |
affected |
| mcp-tool-shop-org | backpropagate | >= 1.1.0, < 1.2.0 |
affected |
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一、 漏洞 CVE-2026-48797 基础信息
漏洞信息
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Vulnerability Title
Backpropagate: backprop ui --auth and backprop ui --share do not enforce authentication
来源: CVE Program / CVE List V5
Vulnerability Description
Backpropagate is a Python library for fine-tuning large language models on a single GPU. In versions 1.1.0 and 1.1.1, the optional Reflex web UI exposes a training control plane without authentication: dataset upload, model load, training start/stop, multi-run orchestration, GGUF export, and HuggingFace Hub push. The CLI accepts two operator-facing flags intended as security controls: --auth user:pass — documented as "require HTTP Basic authentication on every request to the UI." and--share — documented as "expose the UI on a public address; requires --auth." When --auth user:pass is passed, the CLI prints Auth: enabled (user: <username>) to confirm to the operator that authentication is active, then exports BACKPROPAGATE_UI_AUTH=user:pass to the subprocess that launches the Reflex backend. The Reflex backend (backpropagate/ui_app/**) never reads BACKPROPAGATE_UI_AUTH. No authentication middleware is registered. No request-level guard runs. No WebSocket upgrade guard runs. Any client that reaches the bound port — local or remote, depending on whether --share is used — has full UI access. An inline comment at backpropagate/cli.py:1217-1218 in the v1.1.0 source documents the gap: "For Phase 1 the variable is exported but Reflex doesn't read it yet." This comment was internal-facing; the user-facing documentation (README, CHANGELOG, SHIP_GATE) advertised the contract as enforced. An attacker who reaches the bound port can read uploaded datasets, trigger arbitrary training runs against any local base models as well as read their paths, trigger HuggingFace Hub pushes and cause disk-fill DoS. This issue has been fixed in version 1.2.0. If developers cannot immediately upgrade to 1.2.0 run backprop ui with no flags so it binds to localhost, use SSH port-forwarding (ssh -L 7860:localhost:7860 <training-host>) instead of --share for remote access, and audit any host previously launched with --share, re-issuing any HF tokens used during those sessions.
来源: CVE Program / CVE List V5
CVSS Information
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
来源: CVE Program / CVE List V5
Vulnerability Type
不恰当实现的标准安全检查
来源: CVE Program / CVE List V5
Vulnerability Title
MCP Tool Shop Backpropagate 信息泄露漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
MCP Tool Shop Backpropagate是MCP Tool Shop组织的一个大语言模型微调平台。 backpropagate 1.1.0版本和1.1.1版本存在安全漏洞，该漏洞源于Reflex web UI认证缺失，可能导致攻击者读取上传的数据集、触发任意训练运行、推送至HuggingFace Hub以及造成磁盘填满拒绝服务。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| mcp-tool-shop-org | backpropagate | >= 1.1.0, < 1.2.0 | - |
|
| mcp-tool-shop-org | @mcptoolshop/backpropagate | >= 1.1.0, < 1.2.0 | - |
|
二、漏洞 CVE-2026-48797 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-48797 补丁与修复 (1)
CVE-2026-48797 厂商安全公告 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-48797
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