{"id":"CLEANSTART-2026-XX88354","summary":"crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning","details":"Security vulnerability affects the apache2 package. A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning.","modified":"2026-10-09T01:00:23.475991420Z","published":"2026-10-09T00:49:54.027894Z","upstream":["CVE-2021-33193"],"database_specific":{},"references":[{"type":"ADVISORY","url":"https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-XX88354.json"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2021-33193"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33193"}],"affected":[{"package":{"name":"apache2","ecosystem":"CleanStart","purl":"pkg:apk/cleanstart/apache2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.49-r0"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-XX88354.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}