{"id":"CVE-2026-31842","summary":"Tinyproxy HTTP request parsing desynchronization via case-sensitive Transfer-Encoding handling","details":"Tinyproxy through 1.11.3 is vulnerable to HTTP request parsing desynchronization due to a case-sensitive comparison of the Transfer-Encoding header in src/reqs.c. The is_chunked_transfer function uses strcmp to compare the header value against \"chunked\", even though RFC 7230 specifies that transfer-coding names are case-insensitive.","modified":"2026-08-12T03:51:15.371727532Z","published":"2026-04-07T11:17:33.621Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31842.json","cna_assigner":"TuranSec","cwe_ids":["CWE-444"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31842.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31842"},{"type":"REPORT","url":"https://github.com/tinyproxy/tinyproxy/issues/604"},{"type":"PACKAGE","url":"https://github.com/tinyproxy/tinyproxy"},{"type":"ARTICLE","url":"https://datatracker.ietf.org/doc/html/rfc7230"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/tinyproxy/tinyproxy","events":[{"introduced":"0"},{"last_affected":"baecbf4c3e006fa68ab92f65bbd4138c47ede111"}],"database_specific":{"cpe":"cpe:2.3:a:tinyproxy_project:tinyproxy:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"1.11.3"}],"source":["AFFECTED_FIELD","CPE_RANGE"]}}],"versions":["1.11.3","1.11.2","1.11.1","1.11.0","1.11.0-rc1","1.10.0","1.8.0","1.7.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31842.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}