{"id":"CVE-2026-85077","title":"Sanic is an opensource python web server/framework","summary":"Sanic is an opensource python web server/framework. Prior to version 24.12.1, and in version 25.12.0, the HTTP/1.1 response pipeline in sanic/response/types.py serializes response header names and values without rejecting carriage-return…","severity":"high","cvss":8.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","cwe":["CWE-113","CWE-93"],"vendor":"sanic-org","product":"sanic","affected":["sanic < 24.12.1","sanic >= 25.12.0, < 25.12.1"],"published":"2026-09-17","updated":"2026-09-21","sourceUpdated":"2026-09-21T21:17:13.910","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-85077","references":[{"url":"https://github.com/sanic-org/sanic/commit/47349d689d65fa1907977ac100e867894aeafb22","label":"security-advisories@github.com"},{"url":"https://github.com/sanic-org/sanic/commit/9a95bb1c187558949606b915f5162c15f2db781b","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-m64h-22vf-48wm","label":"security-advisories@github.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85077.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-85077"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-85077"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85077"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536070"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-21T20:45:00.743376Z"},"epss":0.00272,"epssPercentile":0.19819,"ingestedAt":"2026-09-17T15:20:39.000Z","slug":"CVE-2026-85077","body":"## Overview\n\nSanic is an opensource python web server/framework. Prior to version 24.12.1, and in version 25.12.0, the HTTP/1.1 response pipeline in sanic/response/types.py serializes response header names and values without rejecting carriage-return or line-feed characters. Applications that place attacker-controlled data in response.headers, file(..., filename=...), or cookie path and domain attributes can therefore emit injected headers and may split responses. Depending on application and proxy behavior, this can enable session fixation through injected cookies, cache poisoning, or security-header corruption. This issue is fixed in versions 24.12.1 and 25.12.1.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\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-2026-85077.json)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":45.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}