{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "nghttp2 ist eine Implementierung von HTTP/2 und dessen Header-Kompressionsalgorithmus HPACK in C.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in nghttp2 ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- Sonstiges\n- UNIX\n- Windows",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-0775 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0775.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-0775 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0775"
      },
      {
        "category": "external",
        "summary": "nghttp2 GitHub Security Advisory GHSA-6933-cjhr-5qg6 vom 2026-03-17",
        "url": "https://github.com/nghttp2/nghttp2/security/advisories/GHSA-6933-cjhr-5qg6"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:1074-1 vom 2026-03-26",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024959.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:1056-1 vom 2026-03-26",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024951.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:20870-1 vom 2026-03-27",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/024971.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:20833-1 vom 2026-03-28",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-March/025004.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:20925-1 vom 2026-04-01",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-April/025092.html"
      },
      {
        "category": "external",
        "summary": "Google Container-Optimized OS release notes vom 2026-04-04",
        "url": "https://docs.cloud.google.com/container-optimized-os/docs/release-notes#March_30_2026"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:7670 vom 2026-04-13",
        "url": "https://errata.build.resf.org/RLSA-2026:7670"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:1247-1 vom 2026-04-10",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-April/025204.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:7670 vom 2026-04-13",
        "url": "https://access.redhat.com/errata/RHSA-2026:7670"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:7666 vom 2026-04-13",
        "url": "https://access.redhat.com/errata/RHSA-2026:7666"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:7667 vom 2026-04-13",
        "url": "https://access.redhat.com/errata/RHSA-2026:7667"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:7668 vom 2026-04-13",
        "url": "https://access.redhat.com/errata/RHSA-2026:7668"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2026-7666 vom 2026-04-13",
        "url": "https://linux.oracle.com/errata/ELSA-2026-7666.html"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:7983 vom 2026-04-14",
        "url": "https://access.redhat.com/errata/RHSA-2026:7983"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2026-7668 vom 2026-04-13",
        "url": "https://linux.oracle.com/errata/ELSA-2026-7668.html"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS2-2026-3232 vom 2026-04-14",
        "url": "https://alas.aws.amazon.com/AL2/ALAS2-2026-3232.html"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:7896 vom 2026-04-14",
        "url": "https://errata.build.resf.org/RLSA-2026:7896"
      },
      {
        "category": "external",
        "summary": "Oracle Linux Security Advisory ELSA-2026-7667 vom 2026-04-13",
        "url": "https://linux.oracle.com/errata/ELSA-2026-7667.html"
      },
      {
        "category": "external",
        "summary": "SUSE Security Update SUSE-SU-2026:1350-1 vom 2026-04-15",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2026-April/025367.html"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:7668 vom 2026-04-15",
        "url": "https://errata.build.resf.org/RLSA-2026:7668"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:8339 vom 2026-04-16",
        "url": "https://errata.build.resf.org/RLSA-2026:8339"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:7666 vom 2026-04-15",
        "url": "https://errata.build.resf.org/RLSA-2026:7666"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:8339 vom 2026-04-15",
        "url": "https://access.redhat.com/errata/RHSA-2026:8339"
      },
      {
        "category": "external",
        "summary": "Rocky Linux Security Advisory RLSA-2026:7667 vom 2026-04-16",
        "url": "https://errata.build.resf.org/RLSA-2026:7667"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:8546 vom 2026-04-16",
        "url": "https://access.redhat.com/errata/RHSA-2026:8546"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:8545 vom 2026-04-16",
        "url": "https://access.redhat.com/errata/RHSA-2026:8545"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:8541 vom 2026-04-16",
        "url": "https://access.redhat.com/errata/RHSA-2026:8541"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:8540 vom 2026-04-16",
        "url": "https://access.redhat.com/errata/RHSA-2026:8540"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:8539 vom 2026-04-16",
        "url": "https://access.redhat.com/errata/RHSA-2026:8539"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:8538 vom 2026-04-16",
        "url": "https://access.redhat.com/errata/RHSA-2026:8538"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:8548 vom 2026-04-16",
        "url": "https://access.redhat.com/errata/RHSA-2026:8548"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:8547 vom 2026-04-16",
        "url": "https://access.redhat.com/errata/RHSA-2026:8547"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:8868 vom 2026-04-20",
        "url": "https://access.redhat.com/errata/RHSA-2026:8868"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:10065 vom 2026-04-23",
        "url": "https://access.redhat.com/errata/RHSA-2026:10065"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:9711 vom 2026-04-22",
        "url": "https://access.redhat.com/errata/RHSA-2026:9711"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:9832 vom 2026-04-22",
        "url": "https://access.redhat.com/errata/RHSA-2026:9832"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:9874 vom 2026-04-22",
        "url": "https://access.redhat.com/errata/RHSA-2026:9874"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:11768 vom 2026-04-29",
        "url": "https://access.redhat.com/errata/RHSA-2026:11768"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:13812 vom 2026-05-05",
        "url": "https://access.redhat.com/errata/RHSA-2026:13812"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8233-1 vom 2026-05-05",
        "url": "https://ubuntu.com/security/notices/USN-8233-1"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8233-2 vom 2026-05-06",
        "url": "https://ubuntu.com/security/notices/USN-8233-2"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:14391 vom 2026-05-07",
        "url": "https://access.redhat.com/errata/RHSA-2026:14391"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:14937 vom 2026-05-08",
        "url": "https://access.redhat.com/errata/RHSA-2026:14937"
      },
      {
        "category": "external",
        "summary": "IBM Security Bulletin 7272299 vom 2026-05-07",
        "url": "https://www.ibm.com/support/pages/node/7272299"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory vom 2026-05-13",
        "url": "https://access.redhat.com/errata/RHSA-2026:14773"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:15087 vom 2026-05-13",
        "url": "https://access.redhat.com/errata/RHSA-2026:15087"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DSA-6266 vom 2026-05-14",
        "url": "https://lists.debian.org/debian-security-announce/2026/msg00177.html"
      },
      {
        "category": "external",
        "summary": "IBM Security Bulletin 7273145 vom 2026-05-15",
        "url": "https://www.ibm.com/support/pages/node/7273145"
      },
      {
        "category": "external",
        "summary": "IBM Security Bulletin 7273338 vom 2026-05-18",
        "url": "https://www.ibm.com/support/pages/node/7273338"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:19724 vom 2026-05-21",
        "url": "https://access.redhat.com/errata/RHSA-2026:19724"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:17596 vom 2026-05-20",
        "url": "https://access.redhat.com/errata/RHSA-2026:17596"
      }
    ],
    "source_lang": "en-US",
    "title": "nghttp2: Schwachstelle erm\u00f6glicht Denial of Service",
    "tracking": {
      "current_release_date": "2026-05-20T22:00:00.000+00:00",
      "generator": {
        "date": "2026-05-21T07:56:26.370+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-0775",
      "initial_release_date": "2026-03-17T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-03-17T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-03-18T23:00:00.000+00:00",
          "number": "2",
          "summary": "Referenz(en) aufgenommen: EUVD-2026-12919"
        },
        {
          "date": "2026-03-26T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2026-03-29T22:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2026-04-01T22:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von SUSE aufgenommen"
        },
        {
          "date": "2026-04-06T22:00:00.000+00:00",
          "number": "6",
          "summary": "Neue Updates aufgenommen"
        },
        {
          "date": "2026-04-12T22:00:00.000+00:00",
          "number": "7",
          "summary": "Neue Updates von Rocky Enterprise Software Foundation, SUSE und Red Hat aufgenommen"
        },
        {
          "date": "2026-04-13T22:00:00.000+00:00",
          "number": "8",
          "summary": "Neue Updates von Red Hat, Oracle Linux, Amazon und Rocky Enterprise Software Foundation aufgenommen"
        },
        {
          "date": "2026-04-15T22:00:00.000+00:00",
          "number": "9",
          "summary": "Neue Updates von SUSE, Rocky Enterprise Software Foundation und Red Hat aufgenommen"
        },
        {
          "date": "2026-04-16T22:00:00.000+00:00",
          "number": "10",
          "summary": "Neue Updates von Rocky Enterprise Software Foundation und Red Hat aufgenommen"
        },
        {
          "date": "2026-04-19T22:00:00.000+00:00",
          "number": "11",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2026-04-22T22:00:00.000+00:00",
          "number": "12",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2026-04-29T22:00:00.000+00:00",
          "number": "13",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2026-05-05T22:00:00.000+00:00",
          "number": "14",
          "summary": "Neue Updates von Red Hat und Ubuntu aufgenommen"
        },
        {
          "date": "2026-05-06T22:00:00.000+00:00",
          "number": "15",
          "summary": "Neue Updates von Ubuntu und Red Hat aufgenommen"
        },
        {
          "date": "2026-05-07T22:00:00.000+00:00",
          "number": "16",
          "summary": "Neue Updates von Red Hat und IBM aufgenommen"
        },
        {
          "date": "2026-05-14T22:00:00.000+00:00",
          "number": "17",
          "summary": "Neue Updates von Red Hat und Debian aufgenommen"
        },
        {
          "date": "2026-05-17T22:00:00.000+00:00",
          "number": "18",
          "summary": "Neue Updates von IBM aufgenommen"
        },
        {
          "date": "2026-05-18T22:00:00.000+00:00",
          "number": "19",
          "summary": "Neue Updates von IBM aufgenommen"
        },
        {
          "date": "2026-05-20T22:00:00.000+00:00",
          "number": "20",
          "summary": "Neue Updates von Red Hat aufgenommen"
        }
      ],
      "status": "final",
      "version": "20"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Amazon Linux 2",
            "product": {
              "name": "Amazon Linux 2",
              "product_id": "398363",
              "product_identification_helper": {
                "cpe": "cpe:/o:amazon:linux_2:-"
              }
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        ],
        "category": "vendor",
        "name": "Amazon"
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        "branches": [
          {
            "category": "product_name",
            "name": "Debian Linux",
            "product": {
              "name": "Debian Linux",
              "product_id": "2951",
              "product_identification_helper": {
                "cpe": "cpe:/o:debian:debian_linux:-"
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        "category": "vendor",
        "name": "Debian"
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      {
        "branches": [
          {
            "category": "product_name",
            "name": "Google Container-Optimized OS",
            "product": {
              "name": "Google Container-Optimized OS",
              "product_id": "1607324",
              "product_identification_helper": {
                "cpe": "cpe:/o:google:container-optimized_os:-"
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        ],
        "category": "vendor",
        "name": "Google"
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      {
        "branches": [
          {
            "category": "product_name",
            "name": "IBM App Connect Enterprise",
            "product": {
              "name": "IBM App Connect Enterprise",
              "product_id": "T051349",
              "product_identification_helper": {
                "cpe": "cpe:/a:ibm:app_connect_enterprise:-"
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                "category": "product_name",
                "name": "IBM MQ",
                "product": {
                  "name": "IBM MQ",
                  "product_id": "T021398",
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                    "cpe": "cpe:/a:ibm:mq:-"
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              {
                "category": "product_version",
                "name": "Agent",
                "product": {
                  "name": "IBM MQ Agent",
                  "product_id": "T054280",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:ibm:mq:agent"
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            "category": "product_name",
            "name": "MQ"
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        "category": "vendor",
        "name": "IBM"
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      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c1.68.1",
                "product": {
                  "name": "Open Source nghttp2 \u003c1.68.1",
                  "product_id": "T051878"
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              },
              {
                "category": "product_version",
                "name": "1.68.1",
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                  "name": "Open Source nghttp2 1.68.1",
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                    "cpe": "cpe:/a:nghttp2:nghttp2:1.68.1"
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        "name": "Open Source"
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            "name": "Oracle Linux",
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            "name": "RESF Rocky Linux",
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                  "product_id": "T054017"
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              },
              {
                "category": "product_version",
                "name": "Container Platform 4.15.64",
                "product": {
                  "name": "Red Hat OpenShift Container Platform 4.15.64",
                  "product_id": "T054017-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:openshift:container_platform__4.15.64"
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                }
              },
              {
                "category": "product_version_range",
                "name": "Container Platform \u003c4.17.54",
                "product": {
                  "name": "Red Hat OpenShift Container Platform \u003c4.17.54",
                  "product_id": "T054403"
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              },
              {
                "category": "product_version",
                "name": "Container Platform 4.17.54",
                "product": {
                  "name": "Red Hat OpenShift Container Platform 4.17.54",
                  "product_id": "T054403-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:openshift:container_platform__4.17.54"
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            "category": "product_name",
            "name": "OpenShift"
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        "category": "vendor",
        "name": "Red Hat"
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        "branches": [
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            "category": "product_name",
            "name": "SUSE Linux",
            "product": {
              "name": "SUSE Linux",
              "product_id": "T002207",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:suse_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Ubuntu Linux",
            "product": {
              "name": "Ubuntu Linux",
              "product_id": "T000126",
              "product_identification_helper": {
                "cpe": "cpe:/o:canonical:ubuntu_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Ubuntu"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-27135",
      "product_status": {
        "known_affected": [
          "67646",
          "T054403",
          "T004914",
          "T054017",
          "T032255",
          "2951",
          "T002207",
          "T051349",
          "T000126",
          "T051878",
          "T054280",
          "398363",
          "T021398",
          "1607324"
        ]
      },
      "release_date": "2026-03-17T23:00:00.000+00:00",
      "title": "CVE-2026-27135"
    }
  ]
}