CVE-2026-67182

The record

Rouille 0.3.3 through 3.6.2 contains an HTTP request smuggling vulnerability that allows remote attackers to bypass access controls by injecting bare line feed characters (0x0A) into client-supplied request header values that are copied verbatim to upstream connections without validation. Attackers can craft a header value containing a complete additional HTTP request that is interpreted as a separate request by backends such as Go net/http and Python http.server, causing the backend to process a smuggled request with attacker-chosen method, path, and headers that bypasses the rouille handler's access control logic.

Affected packages

Related vulnerabilities

• CVE-2026-55613 uhttpd is a small HTTP server. CWE-444
• CVE-2026-55614 uhttpd is a small HTTP server. CWE-444
• CVE-2026-55612 uhttpd is a small HTTP server. CWE-444
• CVE-2026-116127 Starlet versions before 0.33 for Perl send a body in responses to HEAD requests… CWE-444
• CVE-2026-91920 A flaw was found in the ChunkReader component of the Undertow web server, which is used… CWE-444
• CVE-2026-118264 Echo is a Go web framework. CWE-444
• CVE-2026-103995 Response body and chunk parsing would handle non-hex or negative integers incorrectly… CWE-444
• CVE-2026-115823 Starman versions before 0.4019 for Perl send response bodies for HEAD requests… CWE-444