{"id":"CVE-2021-39156","state":"PUBLISHED","title":"Fragments in Path May Lead to Authorization Policy Bypass","description":"Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize the path.","publishedAt":"2021-08-24T22:30:12.000Z","updatedAt":"2024-08-04T01:58:18.136Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["istio istio"],"affected":[{"vendor":"istio","product":"istio","versions":[{"version":"< 1.9.8","status":"affected"},{"version":">= 1.10.0, < 1.10.4","status":"affected"},{"version":">= 1.11.0, < 1.11.1","status":"affected"}]}],"references":["https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4r","https://istio.io/latest/news/security/istio-security-2021-008"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T19:48:52.666Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/39xxx/CVE-2021-39156.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-39156","state":"PUBLISHED","datePublished":"2021-08-24T22:30:12.000Z","dateUpdated":"2024-08-04T01:58:18.136Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2021-08-16T00:00:00.000Z"},"containers":{"cna":{"title":"Fragments in Path May Lead to Authorization Policy Bypass","descriptions":[{"lang":"en","value":"Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. 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