{"action":"Upgrade istio.io/istio to 1.9.8 or later.","affected":[{"fixed":"1.9.8","introduced":"0"},{"fixed":"1.10.4","introduced":"1.10.0"},{"fixed":"1.11.1","introduced":"1.11.0"}],"component":"istio.io/istio","cve_ids":["CVE-2021-39155"],"ecosystem":"Go","epss":0.01253,"exploited":false,"fixed_versions":["1.9.8","1.10.4","1.11.1"],"ghsa_id":"GHSA-7774-7vr3-cc8j","id":"tcs_01M5KF1GXVJR1DKJ48ECCTSCS7","modified_at":"2026-09-10T03:49:07.371161372Z","published_at":"2021-08-30T16:15:56Z","references":["https://osv.dev/vulnerability/GHSA-7774-7vr3-cc8j","https://github.com/istio/istio/security/advisories/GHSA-7774-7vr3-cc8j","https://nvd.nist.gov/vuln/detail/CVE-2021-39155","https://github.com/istio/istio/commit/084b417a486dbe9b9024d4812877016a484572b1","https://github.com/istio/istio/commit/76ed51413ddd2a7fa253a368ab20a9cec5fb1cbe","https://github.com/istio/istio/commit/90b00bdf891e6c770cb3235c14a9b1fda96cc7c5","https://datatracker.ietf.org/doc/html/rfc4343","https://github.com/istio/istio"],"severity":{"label":"high","score":8.3},"sources":[{"source":"osv","source_id":"GHSA-7774-7vr3-cc8j","url":"https://osv.dev/vulnerability/GHSA-7774-7vr3-cc8j"}],"summary":"Authorization Policy Bypass Due to Case Insensitive Host Comparison"}