{
  "threat_severity" : "Important",
  "public_date" : "2026-03-18T17:59:02Z",
  "bugzilla" : {
    "description" : "nghttp2: nghttp2: Denial of Service via malformed HTTP/2 frames after session termination",
    "id" : "2448754",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2448754"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-617",
  "details" : [ "nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available.", "A flaw was found in nghttp2. Due to missing internal state validation, the library continues to process incoming data even after a session has been terminated. A remote attacker could exploit this by sending a specially crafted HTTP/2 frame, leading to an assertion failure and a denial of service (DoS)." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-04-08T00:00:00Z",
    "advisory" : "RHSA-2026:7080",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.1",
    "package" : "nodejs22-1:22.22.2-1.el10_1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-04-13T00:00:00Z",
    "advisory" : "RHSA-2026:7666",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.1",
    "package" : "nghttp2-0:1.64.0-2.el10_1.1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-04-13T00:00:00Z",
    "advisory" : "RHSA-2026:7675",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.1",
    "package" : "nodejs24-1:24.14.1-2.el10_1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10.0 Extended Update Support",
    "release_date" : "2026-04-09T00:00:00Z",
    "advisory" : "RHSA-2026:7310",
    "cpe" : "cpe:/o:redhat:enterprise_linux_eus:10.0",
    "package" : "nodejs22-1:22.22.2-2.el10_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10.0 Extended Update Support",
    "release_date" : "2026-04-20T00:00:00Z",
    "advisory" : "RHSA-2026:8868",
    "cpe" : "cpe:/o:redhat:enterprise_linux_eus:10.0",
    "package" : "nghttp2-0:1.64.0-2.el10_0.1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-04-08T00:00:00Z",
    "advisory" : "RHSA-2026:7123",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8",
    "package" : "nodejs:22-8100020260331102257.6d880403"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-04-13T00:00:00Z",
    "advisory" : "RHSA-2026:7670",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8",
    "package" : "nodejs:24-8100020260408131901.6d880403"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-04-15T00:00:00Z",
    "advisory" : "RHSA-2026:8339",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8",
    "package" : "nodejs:20-8100020260414073138.489197e6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-04-13T00:00:00Z",
    "advisory" : "RHSA-2026:7667",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "nghttp2-0:1.33.0-6.el8_10.2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Advanced Update Support",
    "release_date" : "2026-04-16T00:00:00Z",
    "advisory" : "RHSA-2026:8541",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.2",
    "package" : "nghttp2-0:1.33.0-3.el8_2.4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
    "release_date" : "2026-04-16T00:00:00Z",
    "advisory" : "RHSA-2026:8539",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.4",
    "package" : "nghttp2-0:1.33.0-4.el8_4.3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
    "release_date" : "2026-04-16T00:00:00Z",
    "advisory" : "RHSA-2026:8539",
    "cpe" : "cpe:/o:redhat:rhel_eus_long_life:8.4",
    "package" : "nghttp2-0:1.33.0-4.el8_4.3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
    "release_date" : "2026-04-16T00:00:00Z",
    "advisory" : "RHSA-2026:8538",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.6",
    "package" : "nghttp2-0:1.33.0-4.el8_6.3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Telecommunications Update Service",
    "release_date" : "2026-04-16T00:00:00Z",
    "advisory" : "RHSA-2026:8538",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.6",
    "package" : "nghttp2-0:1.33.0-4.el8_6.3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions",
    "release_date" : "2026-04-16T00:00:00Z",
    "advisory" : "RHSA-2026:8538",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.6",
    "package" : "nghttp2-0:1.33.0-4.el8_6.3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
    "release_date" : "2026-04-16T00:00:00Z",
    "advisory" : "RHSA-2026:8540",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.8",
    "package" : "nghttp2-0:1.33.0-5.el8_8.2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
    "release_date" : "2026-04-16T00:00:00Z",
    "advisory" : "RHSA-2026:8540",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.8",
    "package" : "nghttp2-0:1.33.0-5.el8_8.2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-04-09T00:00:00Z",
    "advisory" : "RHSA-2026:7302",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "nodejs:22-9070020260401095228.rhel9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-04-09T00:00:00Z",
    "advisory" : "RHSA-2026:7350",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "nodejs:24-9070020260402152654.rhel9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-04-13T00:00:00Z",
    "advisory" : "RHSA-2026:7896",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "nodejs:20-9070020260409073121.rhel9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-04-13T00:00:00Z",
    "advisory" : "RHSA-2026:7668",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "nghttp2-0:1.43.0-6.el9_7.1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions",
    "release_date" : "2026-04-16T00:00:00Z",
    "advisory" : "RHSA-2026:8546",
    "cpe" : "cpe:/o:redhat:rhel_e4s:9.0",
    "package" : "nghttp2-0:1.43.0-5.el9_0.4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
    "release_date" : "2026-04-16T00:00:00Z",
    "advisory" : "RHSA-2026:8545",
    "cpe" : "cpe:/o:redhat:rhel_e4s:9.2",
    "package" : "nghttp2-0:1.43.0-5.el9_2.4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.4 Extended Update Support",
    "release_date" : "2026-04-22T00:00:00Z",
    "advisory" : "RHSA-2026:9711",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.4",
    "package" : "nodejs:20-9040020260421133644.rhel9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.4 Extended Update Support",
    "release_date" : "2026-04-16T00:00:00Z",
    "advisory" : "RHSA-2026:8547",
    "cpe" : "cpe:/o:redhat:rhel_eus:9.4",
    "package" : "nghttp2-0:1.43.0-5.el9_4.4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.6 Extended Update Support",
    "release_date" : "2026-04-14T00:00:00Z",
    "advisory" : "RHSA-2026:7983",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.6",
    "package" : "nodejs:22-9060020260409121057.rhel9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.6 Extended Update Support",
    "release_date" : "2026-04-22T00:00:00Z",
    "advisory" : "RHSA-2026:9874",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.6",
    "package" : "nodejs:20-9060020260422064119.rhel9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.6 Extended Update Support",
    "release_date" : "2026-04-16T00:00:00Z",
    "advisory" : "RHSA-2026:8548",
    "cpe" : "cpe:/o:redhat:rhel_eus:9.6",
    "package" : "nghttp2-0:1.43.0-6.el9_6.1"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4.14",
    "release_date" : "2026-05-13T00:00:00Z",
    "advisory" : "RHSA-2026:15087",
    "cpe" : "cpe:/a:redhat:openshift:4.14::el9",
    "package" : "rhcos-414.92.202605060243-0"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4.15",
    "release_date" : "2026-05-13T00:00:00Z",
    "advisory" : "RHSA-2026:14773",
    "cpe" : "cpe:/a:redhat:openshift:4.15::el9",
    "package" : "rhcos-415.92.202605060220-0"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4.17",
    "release_date" : "2026-05-20T00:00:00Z",
    "advisory" : "RHSA-2026:17596",
    "cpe" : "cpe:/a:redhat:openshift:4.17::el9",
    "package" : "rhcos-417.94.202605112123-0"
  }, {
    "product_name" : "RHEL-8 based Middleware Containers",
    "release_date" : "2026-05-05T00:00:00Z",
    "advisory" : "RHSA-2026:13812",
    "cpe" : "cpe:/a:redhat:rhosemc:1.0::el8",
    "package" : "rhpam-7/rhpam-businesscentral-monitoring-rhel8:7.13.5-4.1777325677"
  }, {
    "product_name" : "RHEL-8 based Middleware Containers",
    "release_date" : "2026-05-05T00:00:00Z",
    "advisory" : "RHSA-2026:13812",
    "cpe" : "cpe:/a:redhat:rhosemc:1.0::el8",
    "package" : "rhpam-7/rhpam-businesscentral-rhel8:7.13.5-4.1777325711"
  }, {
    "product_name" : "RHEL-8 based Middleware Containers",
    "release_date" : "2026-05-05T00:00:00Z",
    "advisory" : "RHSA-2026:13812",
    "cpe" : "cpe:/a:redhat:rhosemc:1.0::el8",
    "package" : "rhpam-7/rhpam-controller-rhel8:7.13.5-4.1777325710"
  }, {
    "product_name" : "RHEL-8 based Middleware Containers",
    "release_date" : "2026-05-05T00:00:00Z",
    "advisory" : "RHSA-2026:13812",
    "cpe" : "cpe:/a:redhat:rhosemc:1.0::el8",
    "package" : "rhpam-7/rhpam-dashbuilder-rhel8:7.13.5-3.1777325680"
  }, {
    "product_name" : "RHEL-8 based Middleware Containers",
    "release_date" : "2026-05-05T00:00:00Z",
    "advisory" : "RHSA-2026:13812",
    "cpe" : "cpe:/a:redhat:rhosemc:1.0::el8",
    "package" : "rhpam-7/rhpam-kieserver-rhel8:7.13.5-4.1777325709"
  }, {
    "product_name" : "RHEL-8 based Middleware Containers",
    "release_date" : "2026-05-05T00:00:00Z",
    "advisory" : "RHSA-2026:13812",
    "cpe" : "cpe:/a:redhat:rhosemc:1.0::el8",
    "package" : "rhpam-7/rhpam-process-migration-rhel8:7.13.5-4.1777325680"
  }, {
    "product_name" : "RHEL-8 based Middleware Containers",
    "release_date" : "2026-05-05T00:00:00Z",
    "advisory" : "RHSA-2026:13812",
    "cpe" : "cpe:/a:redhat:rhosemc:1.0::el8",
    "package" : "rhpam-7/rhpam-smartrouter-rhel8:7.13.5-4.1777325708"
  }, {
    "product_name" : "Red Hat AI Inference Server 3.2",
    "release_date" : "2026-05-20T00:00:00Z",
    "advisory" : "RHSA-2026:19724",
    "cpe" : "cpe:/a:redhat:ai_inference_server:3.2::el9",
    "package" : "rhaiis/vllm-cuda-rhel9:1779223654"
  }, {
    "product_name" : "Red Hat AI Inference Server 3.2",
    "release_date" : "2026-05-20T00:00:00Z",
    "advisory" : "RHSA-2026:19725",
    "cpe" : "cpe:/a:redhat:ai_inference_server:3.2::el9",
    "package" : "rhaiis/vllm-rocm-rhel9:1779223651"
  }, {
    "product_name" : "Red Hat AI Inference Server 3.3",
    "release_date" : "2026-05-11T00:00:00Z",
    "advisory" : "RHSA-2026:16008",
    "cpe" : "cpe:/a:redhat:ai_inference_server:3.3::el9",
    "package" : "rhaiis/model-opt-cuda-rhel9:1778244559"
  }, {
    "product_name" : "Red Hat AI Inference Server 3.3",
    "release_date" : "2026-05-11T00:00:00Z",
    "advisory" : "RHSA-2026:16009",
    "cpe" : "cpe:/a:redhat:ai_inference_server:3.3::el9",
    "package" : "rhaiis/vllm-rocm-rhel9:1778244531"
  }, {
    "product_name" : "Red Hat AI Inference Server 3.3",
    "release_date" : "2026-05-11T00:00:00Z",
    "advisory" : "RHSA-2026:16030",
    "cpe" : "cpe:/a:redhat:ai_inference_server:3.3::el9",
    "package" : "rhaiis/vllm-cuda-rhel9:1778274666"
  }, {
    "product_name" : "Red Hat AI Inference Server 3.3",
    "release_date" : "2026-05-12T00:00:00Z",
    "advisory" : "RHSA-2026:16174",
    "cpe" : "cpe:/a:redhat:ai_inference_server:3.3::el9",
    "package" : "rhaiis/vllm-spyre-rhel9:1778244546"
  }, {
    "product_name" : "Red Hat Discovery 2",
    "release_date" : "2026-05-07T00:00:00Z",
    "advisory" : "RHSA-2026:14937",
    "cpe" : "cpe:/a:redhat:discovery:2::el9",
    "package" : "discovery/discovery-server-rhel9:1778101579"
  }, {
    "product_name" : "Red Hat Discovery 2",
    "release_date" : "2026-05-07T00:00:00Z",
    "advisory" : "RHSA-2026:14937",
    "cpe" : "cpe:/a:redhat:discovery:2::el9",
    "package" : "discovery/discovery-ui-rhel9:1778156756"
  }, {
    "product_name" : "Red Hat Hardened Images",
    "release_date" : "2026-03-30T00:00:00Z",
    "advisory" : "RHSA-2026:6190",
    "cpe" : "cpe:/a:redhat:hummingbird:1",
    "package" : "nghttp2-main-1.68.1-1.hum1"
  }, {
    "product_name" : "Red Hat Insights proxy 1.5",
    "release_date" : "2026-04-22T00:00:00Z",
    "advisory" : "RHSA-2026:9832",
    "cpe" : "cpe:/a:redhat:insights_proxy:1.5::el9",
    "package" : "insights-proxy/insights-proxy-container-rhel9:1776868961"
  }, {
    "product_name" : "Red Hat Update Infrastructure 5",
    "release_date" : "2026-04-23T00:00:00Z",
    "advisory" : "RHSA-2026:10065",
    "cpe" : "cpe:/a:redhat:rhui:5::el9",
    "package" : "rhui5/cds-rhel9:1776868774"
  }, {
    "product_name" : "Red Hat Update Infrastructure 5",
    "release_date" : "2026-04-23T00:00:00Z",
    "advisory" : "RHSA-2026:10065",
    "cpe" : "cpe:/a:redhat:rhui:5::el9",
    "package" : "rhui5/haproxy-rhel9:1776868744"
  }, {
    "product_name" : "Red Hat Update Infrastructure 5",
    "release_date" : "2026-04-23T00:00:00Z",
    "advisory" : "RHSA-2026:10065",
    "cpe" : "cpe:/a:redhat:rhui:5::el9",
    "package" : "rhui5/installer-rhel9:1776868772"
  }, {
    "product_name" : "Red Hat Update Infrastructure 5",
    "release_date" : "2026-04-23T00:00:00Z",
    "advisory" : "RHSA-2026:10065",
    "cpe" : "cpe:/a:redhat:rhui:5::el9",
    "package" : "rhui5/rhua-rhel9:1776868842"
  }, {
    "product_name" : "Red Hat Update Infrastructure 5",
    "release_date" : "2026-04-29T00:00:00Z",
    "advisory" : "RHSA-2026:11768",
    "cpe" : "cpe:/a:redhat:rhui:5::el9",
    "package" : "rhui5/cds-kubernetes-tp-rhel9:1777459441"
  }, {
    "product_name" : "Red Hat Update Infrastructure 5",
    "release_date" : "2026-04-29T00:00:00Z",
    "advisory" : "RHSA-2026:11768",
    "cpe" : "cpe:/a:redhat:rhui:5::el9",
    "package" : "rhui5/installer-tp-rhel9:1777454300"
  }, {
    "product_name" : "Red Hat Update Infrastructure 5",
    "release_date" : "2026-04-29T00:00:00Z",
    "advisory" : "RHSA-2026:11768",
    "cpe" : "cpe:/a:redhat:rhui:5::el9",
    "package" : "rhui5/rhua-tp-rhel9:1777459504"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat JBoss Core Services",
    "fix_state" : "Affected",
    "package_name" : "nghttp2",
    "cpe" : "cpe:/a:redhat:jboss_core_services:1"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-27135\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-27135\nhttps://github.com/nghttp2/nghttp2/commit/5c7df8fa815ac1004d9ecb9d1f7595c4d37f46e1\nhttps://github.com/nghttp2/nghttp2/security/advisories/GHSA-6933-cjhr-5qg6" ],
  "name" : "CVE-2026-27135",
  "csaw" : false
}