{"id":"CVE-2026-85078","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-85078","generatedAt":"2026-10-28T07:41:00.362Z","title":"A remote unauthenticated client can place attacker-controlled bytes in that trailer region, causing Sanic to parse and route them as a hidden second request after the outer request.","description":"Sanic is an opensource python web server/framework. In version 25.12.0, Sanic's core HTTP/1.1 chunked-body handling does not fully consume the trailer-part after the terminating zero chunk before reusing the keep-alive connection buffer. A remote unauthenticated client can place attacker-controlled bytes in that trailer region, causing Sanic to parse and route them as a hidden second request after the outer request. This breaks HTTP request-boundary integrity and can provide a request-smuggling primitive when Sanic is deployed behind intermediaries. This issue is fixed in version 25.12.1.","published":"2026-09-17T15:16:55.000Z","lastModified":"2026-09-30T17:31:45.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L"},"cwe":["CWE-444"],"affected":[],"epss":{"score":0.00511,"percentile":0.43363,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.51%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/sanic-org/sanic/commit/47349d689d65fa1907977ac100e867894aeafb22","source":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/commit/69a10d3b06babaa9e5f6d1af577364e9e53b6dea","source":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/commit/a332796506c7c588b6930b02a8886e43eb8ea8d6","source":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/pull/3164","source":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/pull/3165","source":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/releases/tag/v24.12.1","source":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/releases/tag/v25.12.1","source":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/security/advisories/GHSA-wmj6-g64g-j7q5","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-85078","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}