{"id":"CVE-2026-67182","summary":"Rouille 0.3.3 - 3.6.2 HTTP Request Smuggling via proxy Header Injection","details":"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.","modified":"2026-08-16T11:56:59.052692201Z","published":"2026-07-28T16:18:08.550Z","related":["openSUSE-SU-2026:11527-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67182.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-444"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67182.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67182"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/rouille-http-request-smuggling-via-proxy-header-injection"},{"type":"PACKAGE","url":"https://github.com/tomaka/rouille"},{"type":"EVIDENCE","url":"https://github.com/theopaid/HTTP-Request-Smuggling-Enables-Front-End-Access-Control-Bypass-rouille-"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/tomaka/rouille","events":[{"introduced":"0"},{"last_affected":"536fa0eacaeef93168f3378a0296e3f99da7b3af"}],"database_specific":{"extracted_events":[{"introduced":"0.3.3"},{"last_affected":"3.6.2"}],"source":"AFFECTED_FIELD"}}],"versions":["v3.6.2","v3.6.1","v3.6.0","v3.5.0","v3.4.0","v3.3.1","v3.3.0","v3.2.1","v3.2.0","v3.1.1","v3.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67182.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:L/SA:N"}]}