{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "1.3.0"
              },
              {
                "last_affected": "1.3.6"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "c2bd59595ce699b31d0f931885f023028ff7902b"
            },
            {
              "last_affected": "48148f5be3c6d84fe1fce8a0491d3c89593145a2"
            }
          ],
          "repo": "https://github.com/istio/istio",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {},
  "details": "An issue was discovered in Istio 1.3 through 1.3.6. Under certain circumstances, it is possible to bypass a specifically configured Mixer policy. Istio-proxy accepts the x-istio-attributes header at ingress that can be used to affect policy decisions when Mixer policy selectively applies to a source equal to ingress. To exploit this vulnerability, someone has to encode a source.uid in this header. This feature is disabled by default in Istio 1.3 and 1.4.",
  "id": "CVE-2020-8843",
  "modified": "2026-07-08T05:39:10.576486471Z",
  "published": "2020-02-14T19:15:10.683Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://istio.io/news/security/"
    },
    {
      "type": "ADVISORY",
      "url": "https://istio.io/news/security/istio-security-2020-002/"
    },
    {
      "type": "FIX",
      "url": "https://github.com/istio/istio/commits/master"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}