VULNERABILITY INTELLIGENCE

CVE-2026-67181

CVSS score5.4 MEDIUM
EPSS probability0.41%
CISA KEVNot currently listed
Published2026-07-28
Last modified2026-10-24
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-444

Primary references