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CVE-2026-39847— Emmett has a path traversal in internal assets handler

Quick assessment

Affected
emmett-framework emmett
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.

emmett是Emmett开源的一个全栈Python Web框架。 emmett 2.5.0至2.8.1之前版本存在路径遍历漏洞，该漏洞源于RSGI静态处理程序存在路径遍历问题，可能导致读取资产目录外的任意文件。

CVSS 9.1 · Critical EPSS 0.57% · P46

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2026-39847

Vulnerability Information
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Vulnerability Title
Emmett has a path traversal in internal assets handler
Source: CVE Program / CVE List V5
Vulnerability Description
Emmett is a full-stack Python web framework designed with simplicity. From 2.5.0 to before 2.8.1, the RSGI static handler for Emmett's internal assets (/__emmett__ paths) is vulnerable to path traversal attacks. An attacker can use ../ sequences (eg /__emmett__/../rsgi/handlers.py) to read arbitrary files outside the assets directory. This vulnerability is fixed in 2.8.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
emmett 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
emmett是Emmett开源的一个全栈Python Web框架。 emmett 2.5.0至2.8.1之前版本存在路径遍历漏洞，该漏洞源于RSGI静态处理程序存在路径遍历问题，可能导致读取资产目录外的任意文件。
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
emmett-framework emmett >= 2.5.0, < 2.8.1 -

II. Public POCs for CVE-2026-39847

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III. Intelligence Information for CVE-2026-39847

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IV. Related Vulnerabilities

Same vendor: emmett-framework
Same weakness: CWE-22

V. Comments for CVE-2026-39847

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