Back to overview

CVE-2026-67181

MEDIUM Exploitation: PoC
5.4
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-67181
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-07-28 16:06 UTC
Published
2026-07-28 16:10 UTC
Last updated
2026-07-28 16:35 UTC
Primary CWE
CWE-444
Inconsistent Interpretation of HTTP Requests ('HTTP Request/…
Vendor / Product
tomaka / rouille
Sources
cve.org  ·  NVD

Severity & Metrics

5.4 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
tomaka rouille — 0.3.3 ≤ 3.6.2
Weakness (CWE)
CWESourceDescription
CWE-444 cna Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CVSS scores (2)
ScoreSeverityVersionSourceVector
6.3 MEDIUM 4.0 cna CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
5.4 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L
References (2)
Back to overview