Security advisory

{
  "id": "fea3155220677f6c0874beedc227ede5131b7b8c4833fc78e787778d7f4a6092",
  "url": "https://osv.dev/vulnerability/CVE-2020-16844",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-16844",
    "summary": "In Istio 1.5.0 though 1.5.8 and Istio 1.6.0 through 1.6.7, when users specify an AuthorizationPolicy resource with DENY actions using wildcard suffixes (e.g. *-some-suffix) for source principals or namespace fields, callers will never be denied access, bypassing the intended policy.",
    "evidence": "osv:CVE-2020-16844",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-16844",
      "aliases": [
        "CVE-2020-16844",
        "GHSA-82mm-ffjr-h86c"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/istio/istio",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c3c353285578eb68b334fc8766746b754b6b3789"
                },
                {
                  "last_affected": "80f49905d9108c11f327d7eb683ec184b96bc84e"
                },
                {
                  "introduced": "df8ea82bf434fece015767579ef2e4a16e6a3fb3"
                },
                {
                  "last_affected": "2511ab8c8c59a203e77bb804846593c3690fcf4a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.5.0"
                      },
                      {
                        "last_affected": "1.5.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.6.0"
                      },
                      {
                        "last_affected": "1.6.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.6.7",
            "1.6.6",
            "1.5.8",
            "1.6.5",
            "1.5.6",
            "1.6.3",
            "1.6.1",
            "1.5.4",
            "1.6.0",
            "1.5.3",
            "1.5.2",
            "1.5.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-16844.json"
          }
        }
      ],
      "modified": "2026-10-20T10:52:00.058346744Z",
      "provider": "osv",
      "references": [
        "https://github.com/istio/istio/releases",
        "https://istio.io/latest/news/security/istio-security-2020-009/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-16844",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 383195,
  "published_at": "2020-10-01T17:15:13.15+00:00"
}