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CVE-2026-32881— ewe has an Overly Permissive List of Allowed Inputs

Quick assessment

Affected
vshakitskiy ewe
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.

ewe是Vladislav Shakitskiy个人开发者的一个轻量级Web服务器构建包。 ewe 3.0.4及之前版本存在安全漏洞，该漏洞源于分块传输编码尾部处理不当，可能导致身份验证绕过或伪造代理信任标头。

CVSS 5.3 · Medium EPSS 0.50% · P41
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I. Basic Information for CVE-2026-32881

Vulnerability Information
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Vulnerability Title
ewe has an Overly Permissive List of Allowed Inputs
Source: CVE Program / CVE List V5
Vulnerability Description
ewe is a Gleam web server. ewe is a Gleam web server. Versions 0.6.0 through 3.0.4 are vulnerable to authentication bypass or spoofed proxy-trust headers. Chunked transfer encoding trailer handling merges declared trailer fields into req.headers after body parsing, but the denylist only blocks 9 header names. A malicious client can exploit this by declaring these headers in the Trailer field and appending them after the final chunk, causing request.set_header to overwrite legitimate values (e.g., those set by a reverse proxy). This enables attackers to forge authentication credentials, hijack sessions, bypass IP-based rate limiting, or spoof proxy-trust headers in any downstream middleware that reads headers after ewe.read_body is called. This issue has been fixed in version 3.0.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
宽松定义的白名单
Source: CVE Program / CVE List V5
Vulnerability Title
ewe 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ewe是Vladislav Shakitskiy个人开发者的一个轻量级Web服务器构建包。 ewe 3.0.4及之前版本存在安全漏洞，该漏洞源于分块传输编码尾部处理不当，可能导致身份验证绕过或伪造代理信任标头。
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
vshakitskiy ewe >= 0.6.0, < 3.0.5 -

II. Public POCs for CVE-2026-32881

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III. Intelligence Information for CVE-2026-32881

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Patches & Fixes for CVE-2026-32881 (2)

Vendor Advisories for CVE-2026-32881 (2)

IV. Related Vulnerabilities

Same product: ewe
Same vendor: vshakitskiy
Same weakness: CWE-183

V. Comments for CVE-2026-32881

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