{"id":"CVE-2019-12243","aliases":["EUVD-2022-0859","GHSA-6g5f-f5pm-mjrg"],"status":"published","title":"Istio may not check inbound TCP connections against istio-policy","description":"Istio 1.1.x through 1.1.6 has Incorrect Access Control.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01175,"percentile":0.67767,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-284"],"published":"2019-06-05T14:41:06Z","modified":"2026-10-24T10:30:50Z","fixes":[{"ecosystem":"Go","package":"istio.io/istio","fixed_in":["1.1.7"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"istio.io/istio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.1.0"},{"fixed":"1.1.7"}]}]},{"source":"osv","ecosystem":"Go","package":"istio.io/istio","ranges":[{"type":"SEMVER","events":[{"introduced":"1.1.0"},{"fixed":"1.1.7"}]}]}],"products":[{"vendor":"istio","product":"istio"}],"references":[{"url":"https://istio.io/about/notes/","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory","advisory"]},{"url":"https://istio.io/blog/2019/cve-2019-12243/","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Vendor Advisory","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-12243","tags":["advisory"]},{"url":"https://github.com/istio/istio/issues/13868","tags":["web"]},{"url":"https://github.com/istio/istio/pull/13893/commits/91faba277439dab798185730d1624bd53e37bb06","tags":["web"]},{"url":"https://github.com/advisories/GHSA-6g5f-f5pm-mjrg"},{"url":"https://istio.io/blog/2019/cve-2019-12243","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2019-12243","description":"Istio 1.1.x through 1.1.6 has Incorrect Access Control.","status":"published","published":"2019-06-05T14:41:06Z","modified":"2024-08-04T23:17:38.22Z","updated_at":"2026-11-02T14:20:24.025419Z"}],"euvd":[{"id":"EUVD-2022-0859","description":"Istio 1.1.x through 1.1.6 has Incorrect Access Control.","status":"published","published":"2019-06-05T14:41:06Z","modified":"2024-08-04T23:17:38Z","updated_at":"2026-11-03T02:40:46.416719Z"}],"ghsa":[{"id":"GHSA-6g5f-f5pm-mjrg","title":"Istio may not check inbound TCP connections against istio-policy","description":"Istio 1.1.x through 1.1.6 has Incorrect Access Control. When `disablePolicyChecks` is set to `false`, inbound TCP connections do not generate Check requests to istio-policy and external authorization is not applied.\n\nThis behavior is a result of a change to `istio/pilot/pkg/networking/plugin/mixer/mixer.go` in 1.1.\n","status":"published","published":"2022-02-15T01:57:18Z","modified":"2023-09-29T16:11:51Z","cvss":[{"version":"3.1","score":8.9,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N/E:H/RL:O/RC:C","level":"high"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:37:06.913882Z"}],"nvd":[{"id":"CVE-2019-12243","description":"Istio 1.1.x through 1.1.6 has Incorrect Access Control.","status":"published","published":"2019-06-05T15:29:01.373Z","modified":"2026-06-17T02:14:17.287Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5.4,"vector":"AV:A/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:05:16.285679Z"}],"osv":[{"id":"CVE-2019-12243","description":"Istio 1.1.x through 1.1.6 has Incorrect Access Control.","status":"published","published":"2019-06-05T15:29:01.373Z","modified":"2026-10-24T10:30:50.378062399Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:10.718934Z"},{"id":"GHSA-6g5f-f5pm-mjrg","title":"Istio may not check inbound TCP connections against istio-policy","description":"Istio 1.1.x through 1.1.6 has Incorrect Access Control. When `disablePolicyChecks` is set to `false`, inbound TCP connections do not generate Check requests to istio-policy and external authorization is not applied.\n\nThis behavior is a result of a change to `istio/pilot/pkg/networking/plugin/mixer/mixer.go` in 1.1.\n","status":"published","published":"2022-02-15T01:57:18Z","modified":"2023-11-08T04:01:03.200373Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N/E:H/RL:O/RC:C","level":"critical"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T15:46:39.618611Z"}]}}