USN-8458-1 (UBUNTU-CVE-2026-42055)

Vulnerability from osv_ubuntu – Published: 2026-06-22 13:28 – Updated: 2026-06-30 15:55 – Source website
VLAI
Summary
nginx vulnerabilities
Details

It was discovered that nginx incorrectly handled large headers when proxying HTTP/2 traffic. A remote attacker could use this issue to cause nginx to crash, resulting in a denial of service, or possibly execute arbitrary code. The default compiler options for affected releases should reduce the vulnerability to a denial of service. (CVE-2026-42055)

It was discovered that nginx incorrectly handled character set conversion under certain circumstances. A remote attacker could possibly use this issue to obtain sensitive information or cause nginx to crash, resulting in a denial of service. (CVE-2026-48142)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-42055",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-48142",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/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": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-http-cache-purge",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-http-dav-ext",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-http-echo",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-http-fancyindex",
            "binary_version": "1.18.0-6ubuntu14.16"
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          {
            "binary_name": "libnginx-mod-http-geoip",
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          },
          {
            "binary_name": "libnginx-mod-http-geoip2",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-http-headers-more-filter",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-http-ndk",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-http-subs-filter",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-http-uploadprogress",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-http-upstream-fair",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-nchan",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-rtmp",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip2",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
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            "binary_name": "nginx",
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          },
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            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "nginx-full",
            "binary_version": "1.18.0-6ubuntu14.16"
          },
          {
            "binary_name": "nginx-light",
            "binary_version": "1.18.0-6ubuntu14.16"
          }
        ]
      },
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        "name": "nginx",
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      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
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        "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"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
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            {
              "id": "CVE-2026-42055",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-48142",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/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": "1.24.0-2ubuntu7.13"
          },
          {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.24.0-2ubuntu7.13"
          },
          {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.24.0-2ubuntu7.13"
          },
          {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.24.0-2ubuntu7.13"
          },
          {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.24.0-2ubuntu7.13"
          },
          {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.24.0-2ubuntu7.13"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.24.0-2ubuntu7.13"
          },
          {
            "binary_name": "nginx",
            "binary_version": "1.24.0-2ubuntu7.13"
          },
          {
            "binary_name": "nginx-common",
            "binary_version": "1.24.0-2ubuntu7.13"
          },
          {
            "binary_name": "nginx-core",
            "binary_version": "1.24.0-2ubuntu7.13"
          },
          {
            "binary_name": "nginx-extras",
            "binary_version": "1.24.0-2ubuntu7.13"
          },
          {
            "binary_name": "nginx-full",
            "binary_version": "1.24.0-2ubuntu7.13"
          },
          {
            "binary_name": "nginx-light",
            "binary_version": "1.24.0-2ubuntu7.13"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "nginx",
        "purl": "pkg:deb/ubuntu/nginx@1.24.0-2ubuntu7.13?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.24.0-2ubuntu7.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
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        "1.24.0-2ubuntu1",
        "1.24.0-2ubuntu2",
        "1.24.0-2ubuntu3",
        "1.24.0-2ubuntu4",
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        "1.24.0-2ubuntu7",
        "1.24.0-2ubuntu7.1",
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        "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"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-42055",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-48142",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libnginx-mod-http-geoip",
            "binary_version": "1.28.0-6ubuntu1.8"
          },
          {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.28.0-6ubuntu1.8"
          },
          {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.28.0-6ubuntu1.8"
          },
          {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.28.0-6ubuntu1.8"
          },
          {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.28.0-6ubuntu1.8"
          },
          {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.28.0-6ubuntu1.8"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.28.0-6ubuntu1.8"
          },
          {
            "binary_name": "nginx",
            "binary_version": "1.28.0-6ubuntu1.8"
          },
          {
            "binary_name": "nginx-common",
            "binary_version": "1.28.0-6ubuntu1.8"
          },
          {
            "binary_name": "nginx-core",
            "binary_version": "1.28.0-6ubuntu1.8"
          },
          {
            "binary_name": "nginx-extras",
            "binary_version": "1.28.0-6ubuntu1.8"
          },
          {
            "binary_name": "nginx-full",
            "binary_version": "1.28.0-6ubuntu1.8"
          },
          {
            "binary_name": "nginx-light",
            "binary_version": "1.28.0-6ubuntu1.8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "nginx",
        "purl": "pkg:deb/ubuntu/nginx@1.28.0-6ubuntu1.8?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.28.0-6ubuntu1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.26.3-2ubuntu1",
        "1.26.3-3ubuntu1",
        "1.26.3-3ubuntu2",
        "1.26.3-3ubuntu3",
        "1.28.0-3ubuntu1",
        "1.28.0-4ubuntu1",
        "1.28.0-6ubuntu1",
        "1.28.0-6ubuntu1.1",
        "1.28.0-6ubuntu1.2",
        "1.28.0-6ubuntu1.3",
        "1.28.0-6ubuntu1.4",
        "1.28.0-6ubuntu1.5",
        "1.28.0-6ubuntu1.6",
        "1.28.0-6ubuntu1.7"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-42055",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-48142",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/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": "1.28.3-2ubuntu1.6"
          },
          {
            "binary_name": "libnginx-mod-http-image-filter",
            "binary_version": "1.28.3-2ubuntu1.6"
          },
          {
            "binary_name": "libnginx-mod-http-perl",
            "binary_version": "1.28.3-2ubuntu1.6"
          },
          {
            "binary_name": "libnginx-mod-http-xslt-filter",
            "binary_version": "1.28.3-2ubuntu1.6"
          },
          {
            "binary_name": "libnginx-mod-mail",
            "binary_version": "1.28.3-2ubuntu1.6"
          },
          {
            "binary_name": "libnginx-mod-stream",
            "binary_version": "1.28.3-2ubuntu1.6"
          },
          {
            "binary_name": "libnginx-mod-stream-geoip",
            "binary_version": "1.28.3-2ubuntu1.6"
          },
          {
            "binary_name": "nginx",
            "binary_version": "1.28.3-2ubuntu1.6"
          },
          {
            "binary_name": "nginx-common",
            "binary_version": "1.28.3-2ubuntu1.6"
          },
          {
            "binary_name": "nginx-core",
            "binary_version": "1.28.3-2ubuntu1.6"
          },
          {
            "binary_name": "nginx-extras",
            "binary_version": "1.28.3-2ubuntu1.6"
          },
          {
            "binary_name": "nginx-full",
            "binary_version": "1.28.3-2ubuntu1.6"
          },
          {
            "binary_name": "nginx-light",
            "binary_version": "1.28.3-2ubuntu1.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "nginx",
        "purl": "pkg:deb/ubuntu/nginx@1.28.3-2ubuntu1.6?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.28.3-2ubuntu1.6"
            }
          ],
          "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"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that nginx incorrectly handled large headers when\nproxying HTTP/2 traffic. A remote attacker could use this issue to cause\nnginx to crash, resulting in a denial of service, or possibly execute\narbitrary code. The default compiler options for affected releases should\nreduce the vulnerability to a denial of service. (CVE-2026-42055)\n\nIt was discovered that nginx incorrectly handled character set conversion\nunder certain circumstances. A remote attacker could possibly use this\nissue to obtain sensitive information or cause nginx to crash, resulting in\na denial of service. (CVE-2026-48142)",
  "id": "USN-8458-1",
  "modified": "2026-06-30T15:55:21Z",
  "published": "2026-06-22T13:28:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8458-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-42055"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-48142"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "nginx vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-42055",
    "UBUNTU-CVE-2026-48142"
  ]
}



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