{
  "affected": [
    {
      "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": "2.6.7"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "3a372747333fb1db372af7cf0b18ed7eef7c91f7"
            },
            {
              "last_affected": "532db6a20b2912fe397211eef9f8d564d46a4bdd"
            },
            {
              "introduced": "7dad8b31e3f0c3eadce36fed8c276e83e6583d24"
            },
            {
              "fixed": "5e34a17a8f7787e90f41d1af91258a556f0795b4"
            }
          ],
          "repo": "https://github.com/nginx/nginx-gateway-fabric",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "unresolved_ranges": [
      {
        "cpes": [
          "cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:continuous_releases:*:*:*",
          "cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:long-term_support:*:*:*"
        ],
        "extracted_events": [
          {
            "introduced": "3.5.0"
          },
          {
            "last_affected": "3.7.2"
          },
          {
            "introduced": "5.0.0"
          },
          {
            "fixed": "5.5.3"
          },
          {
            "introduced": "2026-lts-r1"
          },
          {
            "fixed": "2026-lts-r4"
          }
        ],
        "source": "CPE_RANGE",
        "vendor_product": "f5:nginx_ingress_controller"
      },
      {
        "cpes": [
          "cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*"
        ],
        "extracted_events": [
          {
            "introduced": "37.0.0.1"
          },
          {
            "fixed": "37.0.3.1"
          },
          {
            "introduced": "r33"
          },
          {
            "fixed": "r36"
          }
        ],
        "source": "CPE_RANGE",
        "vendor_product": "f5:nginx_plus"
      },
      {
        "cpes": [
          "cpe:2.3:a:f5:waf:*:*:*:*:*:nginx:*:*"
        ],
        "extracted_events": [
          {
            "introduced": "4.11.0"
          },
          {
            "last_affected": "4.16.0"
          },
          {
            "introduced": "5.2.0"
          },
          {
            "last_affected": "5.8.0"
          },
          {
            "introduced": "5.9.0"
          },
          {
            "fixed": "5.13.4"
          }
        ],
        "source": "CPE_RANGE",
        "vendor_product": "f5:waf"
      },
      {
        "cpes": [
          "cpe:2.3:a:f5:nginx_ingress_controller:4.0.0:*:*:*:continuous_releases:*:*:*",
          "cpe:2.3:a:f5:nginx_ingress_controller:4.0.1:*:*:*:continuous_releases:*:*:*"
        ],
        "extracted_events": [
          {
            "introduced": "4.0.0"
          },
          {
            "last_affected": "4.0.0"
          },
          {
            "introduced": "4.0.1"
          },
          {
            "last_affected": "4.0.1"
          }
        ],
        "source": "CPE_STRING",
        "vendor_product": "f5:nginx_ingress_controller"
      },
      {
        "cpes": [
          "cpe:2.3:a:f5:nginx_plus:r36:-:*:*:*:*:*:*",
          "cpe:2.3:a:f5:nginx_plus:r36:p1:*:*:*:*:*:*",
          "cpe:2.3:a:f5:nginx_plus:r36:p2:*:*:*:*:*:*",
          "cpe:2.3:a:f5:nginx_plus:r36:p3:*:*:*:*:*:*",
          "cpe:2.3:a:f5:nginx_plus:r36:p4:*:*:*:*:*:*",
          "cpe:2.3:a:f5:nginx_plus:r36:p5:*:*:*:*:*:*",
          "cpe:2.3:a:f5:nginx_plus:r36:p6:*:*:*:*:*:*"
        ],
        "extracted_events": [
          {
            "introduced": "r36-NA"
          },
          {
            "last_affected": "r36-NA"
          },
          {
            "introduced": "r36-p1"
          },
          {
            "last_affected": "r36-p1"
          },
          {
            "introduced": "r36-p2"
          },
          {
            "last_affected": "r36-p2"
          },
          {
            "introduced": "r36-p3"
          },
          {
            "last_affected": "r36-p3"
          },
          {
            "introduced": "r36-p4"
          },
          {
            "last_affected": "r36-p4"
          },
          {
            "introduced": "r36-p5"
          },
          {
            "last_affected": "r36-p5"
          },
          {
            "introduced": "r36-p6"
          },
          {
            "last_affected": "r36-p6"
          }
        ],
        "source": "CPE_STRING",
        "vendor_product": "f5:nginx_plus"
      }
    ]
  },
  "details": "A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and a string expression references the map's regex capture variables before referencing the map output variable. Alternatively, the same result could be achieved by using a non-cacheable variable in a string expression under certain conditions. An unauthenticated attacker along with conditions beyond their control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow 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\nImpact:\nThis vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or to possibly trigger a code execution. There is no control plane exposure; this is a data plane issue only.\n\n\n\n\n Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
  "id": "CVE-2026-42533",
  "modified": "2026-08-12T03:51:24.892536515Z",
  "published": "2026-07-15T15:16:33.480Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://my.f5.com/manage/s/article/K000162097"
    }
  ],
  "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"
    }
  ]
}