PT-2026-65525 · Tomaka · Rouille

Theodosis Paidakis · CVE-2026-67181 · Published 2026-07-28 · Updated 2026-07-28

NVD

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L

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.

Exploit

Fix

HTTP Request/Response Smuggling

Weakness Enumeration

CWE-444

Related Identifiers

CVE-2026-67181

Affected Products

Rouille

References · 3

• 🔥 https://github.com/theopaid/HTTP-Request-Smuggling-via-Transfer-Encoding-Desynchronization-rouille- · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-67181 · Security Note
• https://vulncheck.com/advisories/rouille-http-request-smuggling-via-proxy-transfer-encoding-header · Note