{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": [
              "cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*",
              "cpe:2.3:a:f5:nginx_ingress_controller:4.0.0:*:*:*:*:*:*:*",
              "cpe:2.3:a:f5:nginx_ingress_controller:4.0.1:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
              {
                "introduced": "3.5.0"
              },
              {
                "last_affected": "3.7.2"
              },
              {
                "introduced": "5.0.0"
              },
              {
                "fixed": "5.5.1"
              },
              {
                "introduced": "4.0.0"
              },
              {
                "last_affected": "4.0.0"
              },
              {
                "introduced": "4.0.1"
              },
              {
                "last_affected": "4.0.1"
              }
            ],
            "source": [
              "CPE_RANGE",
              "CPE_STRING"
            ]
          },
          "events": [
            {
              "introduced": "33971b8ff54bc55785a7b38c07a21e03bda25080"
            },
            {
              "last_affected": "561824f3077b7615c2fa764bd6d8e7a47e184857"
            },
            {
              "introduced": "8dfabca757830d0821e86206c2db83044e6696f0"
            },
            {
              "fixed": "814710cbaf43c9a37baed249feec0db5f0868fa9"
            },
            {
              "introduced": "81bae7d0360fdf277b2d3e355d02e410ee211ef8"
            },
            {
              "last_affected": "43349033e28d0b6aa38773ff840deba079654a4f"
            }
          ],
          "repo": "https://github.com/nginx/kubernetes-ingress",
          "type": "GIT"
        }
      ],
      "versions": [
        "4.0.0",
        "4.0.1"
      ]
    },
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "1.31.0"
              },
              {
                "fixed": "1.31.2"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "e8053c867f9ab14f323e3019ccab585d857abb66"
            },
            {
              "fixed": "2fd01ed47a1fd2965754c83f53b33a789d0e07f1"
            }
          ],
          "repo": "https://github.com/nginx/nginx",
          "type": "GIT"
        }
      ]
    },
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "1.3.0"
              },
              {
                "last_affected": "1.6.2"
              },
              {
                "introduced": "2.0.0"
              },
              {
                "fixed": "2.6.4"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "3a372747333fb1db372af7cf0b18ed7eef7c91f7"
            },
            {
              "last_affected": "532db6a20b2912fe397211eef9f8d564d46a4bdd"
            },
            {
              "introduced": "7dad8b31e3f0c3eadce36fed8c276e83e6583d24"
            },
            {
              "fixed": "66691213cd771fe56b124786ea6701c7fb8e467a"
            }
          ],
          "repo": "https://github.com/nginx/nginx-gateway-fabric",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "unresolved_ranges": [
      {
        "cpes": [
          "cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:*"
        ],
        "extracted_events": [
          {
            "introduced": "2.17.0"
          },
          {
            "last_affected": "2.22.0"
          }
        ],
        "source": "CPE_RANGE",
        "vendor_product": "f5:nginx_instance_manager"
      },
      {
        "cpes": [
          "cpe:2.3:a:f5:nginx_ingress_controller:4.0.0:*:*:*:*:*:*:*"
        ],
        "extracted_events": [
          {
            "introduced": "4.0.0"
          },
          {
            "last_affected": "4.0.0"
          }
        ],
        "source": "CPE_STRING",
        "vendor_product": "f5:nginx_ingress_controller"
      }
    ]
  },
  "details": "NGINX Open Source has a vulnerability in the ngx_http_v3_module module. When NGINX Open Source is configured to use the HTTP/3 QUIC module, a remote unauthenticated attacker along with conditions beyond their control can use a specially crafted HTTP/3 session to reopen a QPACK encoder stream. This may cause a Use-after-Free in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR.  \n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
  "id": "CVE-2026-42530",
  "modified": "2026-07-08T05:37:00.029723170Z",
  "published": "2026-06-17T15:16:50.630Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/security/cve/CVE-2026-42530"
    },
    {
      "type": "ADVISORY",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2489872"
    },
    {
      "type": "ADVISORY",
      "url": "https://my.f5.com/manage/s/article/K000161616"
    },
    {
      "type": "ADVISORY",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42530.json"
    }
  ],
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}