{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"Critical" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"kata-containers security update", "category":"general", "title":"Synopsis" }, { "text":"An update for kata-containers is now available for openEuler-24.03-LTS,openEuler-24.03-LTS-SP1,openEuler-24.03-LTS-SP2,openEuler-24.03-LTS-SP3,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4", "category":"general", "title":"Summary" }, { "text":"This is core component of Kata Container, to make it work, you need a isulad/docker engine.\n\nSecurity Fix(es):\n\ngRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass resulting from improper input validation of the HTTP/2 `:path` pseudo-header. The gRPC-Go server was too lenient in its routing logic, accepting requests where the `:path` omitted the mandatory leading slash (e.g., `Service/Method` instead of `/Service/Method`). While the server successfully routed these requests to the correct handler, authorization interceptors (including the official `grpc/authz` package) evaluated the raw, non-canonical path string. Consequently, \"deny\" rules defined using canonical paths (starting with `/`) failed to match the incoming request, allowing it to bypass the policy if a fallback \"allow\" rule was present. This affects gRPC-Go servers that use path-based authorization interceptors, such as the official RBAC implementation in `google.golang.org/grpc/authz` or custom interceptors relying on `info.FullMethod` or `grpc.Method(ctx)`; AND that have a security policy contains specific \"deny\" rules for canonical paths but allows other requests by default (a fallback \"allow\" rule). The vulnerability is exploitable by an attacker who can send raw HTTP/2 frames with malformed `:path` headers directly to the gRPC server. The fix in version 1.79.3 ensures that any request with a `:path` that does not start with a leading slash is immediately rejected with a `codes.Unimplemented` error, preventing it from reaching authorization interceptors or handlers with a non-canonical path string. While upgrading is the most secure and recommended path, users can mitigate the vulnerability using one of the following methods: Use a validating interceptor (recommended mitigation); infrastructure-level normalization; and/or policy hardening.(CVE-2026-33186)", "category":"general", "title":"Description" }, { "text":"An update for kata-containers is now available for openEuler-24.03-LTS,openEuler-24.03-LTS-SP1,openEuler-24.03-LTS-SP2,openEuler-24.03-LTS-SP3,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4.\n\nopenEuler Security has rated this update as having a security impact of critical. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section.", "category":"general", "title":"Topic" }, { "text":"Critical", "category":"general", "title":"Severity" }, { "text":"kata-containers", "category":"general", "title":"Affected Component" } ], "publisher":{ "issuing_authority":"openEuler security committee", "name":"openEuler", "namespace":"https://www.openeuler.org", "contact_details":"openeuler-security@openeuler.org", "category":"vendor" }, "references":[ { "summary":"openEuler-SA-2026-1887", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1887" }, { "summary":"CVE-2026-33186", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-33186&packageName=kata-containers" }, { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33186" }, { "summary":"openEuler-SA-2026-1887 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/advisories/2026/csaf-openeuler-sa-2026-1887.json" } ], "title":"An update for kata-containers is now available for openEuler-24.03-LTS,openEuler-24.03-LTS-SP1,openEuler-24.03-LTS-SP2,openEuler-24.03-LTS-SP3,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4", "tracking":{ "initial_release_date":"2026-04-11T22:05:22+08:00", "revision_history":[ { "date":"2026-04-11T22:05:22+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-04-11T22:05:22+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-04-11T22:05:22+08:00", "id":"openEuler-SA-2026-1887", "version":"1.0.0", "status":"final" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ 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"category":"default_component_of" }, { "relates_to_product_reference":"openEuler-20.03-LTS-SP4", "product_reference":"kata-containers-v1.11.1-20.oe2003sp4.x86_64.rpm", "full_product_name":{ "product_id":"openEuler-20.03-LTS-SP4:kata-containers-v1.11.1-20.oe2003sp4.x86_64", "name":"kata-containers-v1.11.1-20.oe2003sp4.x86_64 as a component of openEuler-20.03-LTS-SP4" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-22.03-LTS-SP4", "product_reference":"kata-containers-1.11.1-34.oe2203sp4.x86_64.rpm", "full_product_name":{ "product_id":"openEuler-22.03-LTS-SP4:kata-containers-1.11.1-34.oe2203sp4.x86_64", "name":"kata-containers-1.11.1-34.oe2203sp4.x86_64 as a component of openEuler-22.03-LTS-SP4" }, "category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2026-33186", "notes":[ { "text":"gRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass resulting from improper input validation of the HTTP/2 `:path` pseudo-header. The gRPC-Go server was too lenient in its routing logic, accepting requests where the `:path` omitted the mandatory leading slash (e.g., `Service/Method` instead of `/Service/Method`). While the server successfully routed these requests to the correct handler, authorization interceptors (including the official `grpc/authz` package) evaluated the raw, non-canonical path string. Consequently, \"deny\" rules defined using canonical paths (starting with `/`) failed to match the incoming request, allowing it to bypass the policy if a fallback \"allow\" rule was present. This affects gRPC-Go servers that use path-based authorization interceptors, such as the official RBAC implementation in `google.golang.org/grpc/authz` or custom interceptors relying on `info.FullMethod` or `grpc.Method(ctx)`; AND that have a security policy contains specific \"deny\" rules for canonical paths but allows other requests by default (a fallback \"allow\" rule). The vulnerability is exploitable by an attacker who can send raw HTTP/2 frames with malformed `:path` headers directly to the gRPC server. The fix in version 1.79.3 ensures that any request with a `:path` that does not start with a leading slash is immediately rejected with a `codes.Unimplemented` error, preventing it from reaching authorization interceptors or handlers with a non-canonical path string. While upgrading is the most secure and recommended path, users can mitigate the vulnerability using one of the following methods: Use a validating interceptor (recommended mitigation); infrastructure-level normalization; and/or policy hardening.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS:kata-containers-3.2.0-17.oe2403.aarch64", "openEuler-24.03-LTS-SP1:kata-containers-3.2.0-18.oe2403sp1.aarch64", "openEuler-24.03-LTS-SP2:kata-containers-3.2.0-18.oe2403sp2.aarch64", "openEuler-24.03-LTS-SP3:kata-containers-3.2.0-18.oe2403sp3.aarch64", "openEuler-20.03-LTS-SP4:kata-containers-v1.11.1-20.oe2003sp4.aarch64", "openEuler-22.03-LTS-SP4:kata-containers-1.11.1-34.oe2203sp4.aarch64", "openEuler-24.03-LTS:kata-containers-3.2.0-17.oe2403.src", "openEuler-24.03-LTS-SP1:kata-containers-3.2.0-18.oe2403sp1.src", "openEuler-24.03-LTS-SP2:kata-containers-3.2.0-18.oe2403sp2.src", "openEuler-24.03-LTS-SP3:kata-containers-3.2.0-18.oe2403sp3.src", "openEuler-20.03-LTS-SP4:kata-containers-v1.11.1-20.oe2003sp4.src", "openEuler-22.03-LTS-SP4:kata-containers-1.11.1-34.oe2203sp4.src", "openEuler-24.03-LTS:kata-containers-3.2.0-17.oe2403.x86_64", "openEuler-24.03-LTS-SP1:kata-containers-3.2.0-18.oe2403sp1.x86_64", "openEuler-24.03-LTS-SP2:kata-containers-3.2.0-18.oe2403sp2.x86_64", "openEuler-24.03-LTS-SP3:kata-containers-3.2.0-18.oe2403sp3.x86_64", "openEuler-20.03-LTS-SP4:kata-containers-v1.11.1-20.oe2003sp4.x86_64", "openEuler-22.03-LTS-SP4:kata-containers-1.11.1-34.oe2203sp4.x86_64" ] }, "remediations":[ { "product_ids":{"$ref":"$.vulnerabilities[0].product_status.fixed"}, "details":"kata-containers security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1887" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"CRITICAL", "baseScore":9.1, "vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version":"3.1" }, "products":{"$ref":"$.vulnerabilities[0].product_status.fixed"} } ], "threats":[ { "details":"Critical", "category":"impact" } ], "title":"CVE-2026-33186" } ] }