{"id":"GHSA-2wmf-p7f8-w42h","summary":"EnvoyProxy Envoy Missing HTTP URL path normalization","details":"Envoy 1.9.0 and before does not normalize HTTP URL paths. A remote attacker may craft a relative path, e.g., `something/../admin`, to bypass access control, e.g., a block on `/admin`. A backend server could then interpret the non-normalized path and provide an attacker access beyond the scope provided for by the access control policy.","aliases":["CVE-2019-9901","GHSA-xcx5-93pw-jw2w"],"modified":"2026-09-10T03:49:07.252622383Z","published":"2022-05-24T16:44:38Z","database_specific":{"cwe_ids":["CWE-706"],"severity":"CRITICAL","github_reviewed":true,"github_reviewed_at":"2023-07-14T20:27:42Z","nvd_published_at":"2019-04-25T16:29:00Z"},"references":[{"type":"WEB","url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-xcx5-93pw-jw2w"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-9901"},{"type":"WEB","url":"https://github.com/envoyproxy/envoy/issues/6435"},{"type":"WEB","url":"https://github.com/envoyproxy/envoy/commit/e668e669677e52a00d99652b5a260d1cedafdfa8"},{"type":"PACKAGE","url":"https://github.com/envoyproxy/envoy"},{"type":"WEB","url":"https://github.com/envoyproxy/envoy/blob/main/security/postmortems/cve-2019-9900.md"},{"type":"WEB","url":"https://groups.google.com/forum/#!topic/envoy-announce/VoHfnDqZiAM"},{"type":"WEB","url":"https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_history"}],"affected":[{"package":{"name":"github.com/envoyproxy/envoy","ecosystem":"Go","purl":"pkg:golang/github.com/envoyproxy/envoy"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.9.1"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 1.9.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-2wmf-p7f8-w42h/GHSA-2wmf-p7f8-w42h.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"}]}