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CVE-2026-67181— Rouille 0.3.3 - 3.6.2 HTTP Request Smuggling via proxy Transfer-Encoding Header

Quick assessment

Affected
tomaka rouille
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

tomaka rouille是tomaka个人开发者的一个Rust的Web开发框架。 tomaka rouille 0.3.3版本至3.6.2版本存在输入验证错误漏洞，该漏洞源于代理实现中不当的标头转发，导致HTTP请求夹带攻击，使远程攻击者能够使HTTP消息边界不同步。

CVSS 5.4 · Medium EPSS 0.41% · P33

Affected Version Matrix 1

VendorProduct Version RangeStatus
tomaka rouille 0.3.3≤ 3.6.2 affected
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I. Basic Information for CVE-2026-67181

Vulnerability Information
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Vulnerability Title
Rouille 0.3.3 - 3.6.2 HTTP Request Smuggling via proxy Transfer-Encoding Header
Source: CVE Program / CVE List V5
Vulnerability Description
Rouille 0.3.3 through 3.6.2 contains an HTTP request smuggling vulnerability that allows remote attackers to desynchronize HTTP message boundaries by exploiting improper header forwarding in the proxy implementation. The proxy in src/proxy.rs forwards the client's Transfer-Encoding header to upstream backends unchanged while transmitting a body already de-chunked by tiny_http, enabling CL.TE desynchronization attacks where attackers control where the backend believes the request body ends.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
tomaka rouille 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
tomaka rouille是tomaka个人开发者的一个Rust的Web开发框架。 tomaka rouille 0.3.3版本至3.6.2版本存在输入验证错误漏洞，该漏洞源于代理实现中不当的标头转发，导致HTTP请求夹带攻击，使远程攻击者能够使HTTP消息边界不同步。
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
tomaka rouille 0.3.3 ~ 3.6.2 -

II. Public POCs for CVE-2026-67181

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: HTTP request smuggling via Transfer-Encoding forwarding — backend received smuggled request containing PROOF_782aa5338b84aa1a after TE:chunked framing header
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 10336 chars
GitHub 复现环境（可 clone 直接跑）
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III. Intelligence Information for CVE-2026-67181

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Vendor Advisories for CVE-2026-67181 (1)

Proof of Concept for CVE-2026-67181 (1)

Same Patch Batch · tomaka · 2026-07-28 · 4 CVEs total

CVE-2026-67182 7.5 HIGH Rouille 0.3.3 - 3.6.2 HTTP Request Smuggling via proxy Header Injection
CVE-2026-66754 5.9 MEDIUM Rouille 0.1.6 - 3.6.2 Reachable Assertion DoS via remove_prefix percent-encoding
CVE-2026-66746 5.4 MEDIUM Rouille 0.4.0 - 3.6.2 HTTP Response Splitting via Header Injection

IV. Related Vulnerabilities

Same product: rouille
Same vendor: tomaka
Same weakness: CWE-444

V. Comments for CVE-2026-67181

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