{"id":"CVE-2026-85078","title":"Sanic is an opensource python web server/framework","summary":"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.…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","cwe":["CWE-444"],"vendor":"sanic-org","product":"sanic","affected":["sanic < 24.12.1","sanic >= 25.12.0, < 25.12.1"],"patched":["sanic 24.12.1","sanic 25.12.1"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T20:18:48.810","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-85078","references":[{"url":"https://github.com/sanic-org/sanic/commit/47349d689d65fa1907977ac100e867894aeafb22","label":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/commit/69a10d3b06babaa9e5f6d1af577364e9e53b6dea","label":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/commit/a332796506c7c588b6930b02a8886e43eb8ea8d6","label":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/pull/3164","label":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/pull/3165","label":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/releases/tag/v24.12.1","label":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/releases/tag/v25.12.1","label":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/security/advisories/GHSA-wmj6-g64g-j7q5","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-wmj6-g64g-j7q5"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85078.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-85078"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-85078"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85078"},{"url":"https://github.com/sanic-org/sanic"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536074"}],"tags":["nvd","cve.org","ghsa","pip","csaf","vex","red-hat","osv"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-17T17:06:16.358452Z"},"aliases":["GHSA-wmj6-g64g-j7q5"],"ecosystem":"pip","scores":{"nvd":6.5,"vendor":8.2,"osv":6.5},"ingestedAt":"2026-09-17T15:20:39.000Z","epss":0.00296,"epssPercentile":0.22487,"slug":"CVE-2026-85078","body":"## Overview\n\nSanic 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-85078)\n\nAffected packages:\n\n- `sanic < 24.12.1`\n- `sanic >= 25.12.0, < 25.12.1`\n\nPatched in:\n\n- `sanic 24.12.1`\n- `sanic 25.12.1`\n\nSource: https://github.com/advisories/GHSA-wmj6-g64g-j7q5\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85078.json)","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}