{"cve":"CVE-2026-35536","nvd":{"published":"2026-04-03T04:16:53.550","modified":"2026-07-24T21:10:00.143","status":"Analyzed","description":"In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.set_cookie were not checked for crafted characters.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},"cwes":["CWE-159"],"references":["https://github.com/tornadoweb/tornado/releases/tag/v6.5.5","https://github.com/tornadoweb/tornado/security/advisories/GHSA-78cv-mqj4-43f7"],"products":["tornadoweb:tornado"],"source":"nvd","synced_at":"2026-10-19T22:28:59.047572785+00:00"},"epss":{"cve":"CVE-2026-35536","score":0.00246,"percentile":0.15933,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-78cv-mqj4-43f7","url":"https://osv.dev/vulnerability/GHSA-78cv-mqj4-43f7","summary":"Tornado has incomplete validation of cookie attributes","modified":"2026-09-10T03:50:37.898992264Z","packages":[{"ecosystem":"PyPI","name":"tornado","purl":"pkg:pypi/tornado","ranges":["<6.5.5"],"fixed":["6.5.5"]}]},{"id":"GHSA-fqwm-6jpj-5wxc","url":"https://osv.dev/vulnerability/GHSA-fqwm-6jpj-5wxc","summary":"Tornado has cookie attribute injection via .RequestHandler.set_cookie","modified":"2026-09-10T03:50:44.255695398Z","packages":[{"ecosystem":"PyPI","name":"tornado","purl":"pkg:pypi/tornado","ranges":["<6.5.5"],"fixed":["6.5.5"]}]},{"id":"PYSEC-2026-2287","url":"https://osv.dev/vulnerability/PYSEC-2026-2287","summary":"","modified":"2026-07-13T16:45:06.531920939Z","packages":[{"ecosystem":"PyPI","name":"tornado","purl":"pkg:pypi/tornado","ranges":["<6.5.5"],"fixed":["6.5.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}