{"id":"UBUNTU-CVE-2026-66752","details":"tiny-http through 0.12.0 contains an HTTP request smuggling vulnerability that allows remote attackers to desynchronize request framing by sending a Transfer-Encoding header with any value, including non-chunked codings, which causes the library to unconditionally apply chunk-decoding and discard Content-Length. Attackers can exploit the discrepancy between tiny_http's improper Transfer-Encoding parsing and a correctly-implemented front-end proxy to produce two distinct interpretations of a single byte stream, enabling request smuggling, and can additionally send non-chunked bodies with non-chunked Transfer-Encoding values to cause failed body reads that tie up connections and consume worker threads without signaling errors to clients.","modified":"2026-08-06T03:11:24.292591361Z","published":"2026-07-28T16:20:00Z","upstream":["CVE-2026-66752"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-66752"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-66752"}],"affected":[{"package":{"name":"rust-tiny-http","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/rust-tiny-http?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.12.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.12.0-1","binary_name":"librust-tiny-http-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66752.json"}},{"package":{"name":"rust-tiny-http","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/rust-tiny-http?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.12.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-tiny-http-dev","binary_version":"0.12.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66752.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L"},{"type":"Ubuntu","score":"medium"}]}