CVE-2026-42545— Granian: DoS via WSGI response header panic
Possible ATT&CK Techniques 1AI
T1496 · Resource HijackingAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| emmett-framework | granian | >= 0.2.0, < 2.7.4 | affected |
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I. Basic Information for CVE-2026-42545
Vulnerability Information
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Vulnerability Title
Granian: DoS via WSGI response header panic
Source: NVD (National Vulnerability Database)
Vulnerability Description
Granian is a Rust HTTP server for Python applications. From 0.2.0 to 2.7.4, Granian aborts a worker process if a WSGI application returns an invalid HTTP response header name or value. The WSGI response conversion path uses .unwrap() on both the header name and header value constructors, so malformed output from the application becomes a process abort instead of a handled error. This vulnerability is fixed in 2.7.4.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未捕获的异常
Source: NVD (National Vulnerability Database)
Vulnerability Title
granian 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
granian是Emmett开源的一款基于Rust的高性能Python HTTP服务器。 granian 0.2.0版本至2.7.4版本存在安全漏洞，该漏洞源于WSGI应用程序返回无效HTTP响应标头名称或值时，Granian中止工作进程。
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)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| emmett-framework | granian | >= 0.2.0, < 2.7.4 | - |
II. Public POCs for CVE-2026-42545
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
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V. Comments for CVE-2026-42545
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