usn-8563-1
Vulnerability from osv_ubuntu
Published
2026-07-20 12:17
Modified
2026-07-21 15:03
Summary
nginx vulnerabilities
Details

It was discovered that nginx incorrectly handled certain map directives using regex matching and capture variables. A remote attacker could use this issue to cause nginx to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-42533)

It was discovered that nginx had a use-after-free vulnerability in the ngx_http_ssi_module module when configured with Server-Side Includes, proxy_pass, and proxy buffering disabled directives. An attacker able to intercept traffic and control responses from an upstream server could possibly use this issue to cause nginx to crash, resulting in a denial of service. (CVE-2026-56434)

It was discovered that nginx incorrectly handled certain requests in the ngx_http_slice_module module. A remote attacker could possibly use this issue to obtain sensitive information or cause nginx to crash, resulting in a denial of service. (CVE-2026-60005)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-56434",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-60005",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnginx-mod-http-auth-pam",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-cache-purge",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-dav-ext",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-echo",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-fancyindex",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-geoip",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-geoip2",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-headers-more-filter",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-ndk",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-subs-filter",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-uploadprogress",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-upstream-fair",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-nchan",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-rtmp",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip2",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "nginx",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "nginx-common",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "nginx-core",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "nginx-extras",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "nginx-full",
            "binary_version": "1.18.0-6ubuntu14.17"
          },
          {
            "binary_name": "nginx-light",
            "binary_version": "1.18.0-6ubuntu14.17"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "nginx",
        "purl": "pkg:deb/ubuntu/nginx@1.18.0-6ubuntu14.17?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.18.0-6ubuntu14.17"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.18.0-6ubuntu11",
        "1.18.0-6ubuntu12",
        "1.18.0-6ubuntu14",
        "1.18.0-6ubuntu14.1",
        "1.18.0-6ubuntu14.2",
        "1.18.0-6ubuntu14.3",
        "1.18.0-6ubuntu14.4",
        "1.18.0-6ubuntu14.5",
        "1.18.0-6ubuntu14.6",
        "1.18.0-6ubuntu14.7",
        "1.18.0-6ubuntu14.8",
        "1.18.0-6ubuntu14.10",
        "1.18.0-6ubuntu14.11",
        "1.18.0-6ubuntu14.12",
        "1.18.0-6ubuntu14.13",
        "1.18.0-6ubuntu14.14",
        "1.18.0-6ubuntu14.15",
        "1.18.0-6ubuntu14.16"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-56434",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-60005",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnginx-mod-http-geoip",
            "binary_version": "1.24.0-2ubuntu7.14"
          },
          {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.24.0-2ubuntu7.14"
          },
          {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.24.0-2ubuntu7.14"
          },
          {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.24.0-2ubuntu7.14"
          },
          {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.24.0-2ubuntu7.14"
          },
          {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.24.0-2ubuntu7.14"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.24.0-2ubuntu7.14"
          },
          {
            "binary_name": "nginx",
            "binary_version": "1.24.0-2ubuntu7.14"
          },
          {
            "binary_name": "nginx-common",
            "binary_version": "1.24.0-2ubuntu7.14"
          },
          {
            "binary_name": "nginx-core",
            "binary_version": "1.24.0-2ubuntu7.14"
          },
          {
            "binary_name": "nginx-extras",
            "binary_version": "1.24.0-2ubuntu7.14"
          },
          {
            "binary_name": "nginx-full",
            "binary_version": "1.24.0-2ubuntu7.14"
          },
          {
            "binary_name": "nginx-light",
            "binary_version": "1.24.0-2ubuntu7.14"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "nginx",
        "purl": "pkg:deb/ubuntu/nginx@1.24.0-2ubuntu7.14?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.24.0-2ubuntu7.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.24.0-1ubuntu1",
        "1.24.0-2ubuntu1",
        "1.24.0-2ubuntu2",
        "1.24.0-2ubuntu3",
        "1.24.0-2ubuntu4",
        "1.24.0-2ubuntu6",
        "1.24.0-2ubuntu7",
        "1.24.0-2ubuntu7.1",
        "1.24.0-2ubuntu7.3",
        "1.24.0-2ubuntu7.4",
        "1.24.0-2ubuntu7.5",
        "1.24.0-2ubuntu7.6",
        "1.24.0-2ubuntu7.7",
        "1.24.0-2ubuntu7.8",
        "1.24.0-2ubuntu7.9",
        "1.24.0-2ubuntu7.10",
        "1.24.0-2ubuntu7.11",
        "1.24.0-2ubuntu7.12",
        "1.24.0-2ubuntu7.13"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-56434",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-60005",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnginx-mod-http-geoip",
            "binary_version": "1.28.3-2ubuntu1.7"
          },
          {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.28.3-2ubuntu1.7"
          },
          {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.28.3-2ubuntu1.7"
          },
          {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.28.3-2ubuntu1.7"
          },
          {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.28.3-2ubuntu1.7"
          },
          {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.28.3-2ubuntu1.7"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.28.3-2ubuntu1.7"
          },
          {
            "binary_name": "nginx",
            "binary_version": "1.28.3-2ubuntu1.7"
          },
          {
            "binary_name": "nginx-common",
            "binary_version": "1.28.3-2ubuntu1.7"
          },
          {
            "binary_name": "nginx-core",
            "binary_version": "1.28.3-2ubuntu1.7"
          },
          {
            "binary_name": "nginx-extras",
            "binary_version": "1.28.3-2ubuntu1.7"
          },
          {
            "binary_name": "nginx-full",
            "binary_version": "1.28.3-2ubuntu1.7"
          },
          {
            "binary_name": "nginx-light",
            "binary_version": "1.28.3-2ubuntu1.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "nginx",
        "purl": "pkg:deb/ubuntu/nginx@1.28.3-2ubuntu1.7?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.28.3-2ubuntu1.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.28.0-6ubuntu1",
        "1.28.1-2ubuntu1",
        "1.28.1-3ubuntu1",
        "1.28.2-2ubuntu1",
        "1.28.3-2ubuntu1",
        "1.28.3-2ubuntu1.1",
        "1.28.3-2ubuntu1.2",
        "1.28.3-2ubuntu1.3",
        "1.28.3-2ubuntu1.4",
        "1.28.3-2ubuntu1.5",
        "1.28.3-2ubuntu1.6"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that nginx incorrectly handled certain map directives\nusing regex matching and capture variables. A remote attacker could use\nthis issue to cause nginx to crash, resulting in a denial of service, or\npossibly execute arbitrary code. (CVE-2026-42533)\n\nIt was discovered that nginx had a use-after-free vulnerability in the\nngx_http_ssi_module module when configured with Server-Side Includes,\nproxy_pass, and proxy buffering disabled directives. An attacker able to\nintercept traffic and control responses from an upstream server could\npossibly use this issue to cause nginx to crash, resulting in a denial of\nservice. (CVE-2026-56434)\n\nIt was discovered that nginx incorrectly handled certain requests in the\nngx_http_slice_module module. A remote attacker could possibly use this\nissue to obtain sensitive information or cause nginx to crash, resulting\nin a denial of service. (CVE-2026-60005)",
  "id": "USN-8563-1",
  "modified": "2026-07-21T15:03:50Z",
  "published": "2026-07-20T12:17:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8563-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-42533"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-56434"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-60005"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "nginx vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-42533",
    "UBUNTU-CVE-2026-56434",
    "UBUNTU-CVE-2026-60005"
  ]
}



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