{
  "document" : {
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      "namespace" : "https://access.redhat.com/security/updates/classification/",
      "text" : "Moderate"
    },
    "category" : "csaf_security_advisory",
    "csaf_version" : "2.0",
    "distribution" : {
      "text" : "Copyright © Red Hat, Inc. All rights reserved.",
      "tlp" : {
        "label" : "WHITE",
        "url" : "https://www.first.org/tlp/"
      }
    },
    "lang" : "en",
    "notes" : [ {
      "category" : "summary",
      "text" : "An update for Red Hat Hardened Images RPMs is now available.",
      "title" : "Topic"
    }, {
      "category" : "general",
      "text" : "This update includes the following RPMs:\n\nhaproxy:\n  * haproxy-3.0.19-1.1.hum1 (aarch64, x86_64)\n  * haproxy-3.0.19-1.1.hum1.src (src)",
      "title" : "Details"
    }, {
      "category" : "legal_disclaimer",
      "text" : "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
      "title" : "Terms of Use"
    } ],
    "publisher" : {
      "category" : "vendor",
      "contact_details" : "https://access.redhat.com/security/team/contact/",
      "issuing_authority" : "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name" : "Red Hat Product Security",
      "namespace" : "https://www.redhat.com"
    },
    "references" : [ {
      "category" : "self",
      "summary" : "https://access.redhat.com/errata/RHSA-2026:8749",
      "url" : "https://access.redhat.com/errata/RHSA-2026:8749"
    }, {
      "category" : "external",
      "summary" : "https://images.redhat.com/",
      "url" : "https://images.redhat.com/"
    }, {
      "category" : "external",
      "summary" : "https://access.redhat.com/security/cve/CVE-2026-33555",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-33555"
    }, {
      "category" : "external",
      "summary" : "https://access.redhat.com/security/updates/classification/",
      "url" : "https://access.redhat.com/security/updates/classification/"
    }, {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_8749.json"
    } ],
    "title" : "Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update",
    "tracking" : {
      "current_release_date" : "2026-04-25T16:56:44+00:00",
      "generator" : {
        "date" : "2026-04-25T16:56:44+00:00",
        "engine" : {
          "name" : "Red Hat SDEngine",
          "version" : "4.7.5"
        }
      },
      "id" : "RHSA-2026:8749",
      "initial_release_date" : "2026-04-17T11:19:38+00:00",
      "revision_history" : [ {
        "date" : "2026-04-17T11:19:38+00:00",
        "number" : "1",
        "summary" : "Initial version"
      }, {
        "date" : "2026-04-25T16:54:27+00:00",
        "number" : "2",
        "summary" : "Last updated version"
      }, {
        "date" : "2026-04-25T16:56:44+00:00",
        "number" : "3",
        "summary" : "Last generated version"
      } ],
      "status" : "final",
      "version" : "3"
    }
  },
  "product_tree" : {
    "branches" : [ {
      "branches" : [ {
        "branches" : [ {
          "category" : "product_name",
          "name" : "Red Hat Hardened Images",
          "product" : {
            "name" : "Red Hat Hardened Images",
            "product_id" : "Red Hat Hardened Images",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:redhat:hummingbird:1"
            }
          }
        } ],
        "category" : "product_family",
        "name" : "Red Hat Hardened Images"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "haproxy-main@aarch64",
          "product" : {
            "name" : "haproxy-main@aarch64",
            "product_id" : "haproxy-main@aarch64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/haproxy@3.0.19-1.1.hum1?arch=aarch64&distro=hummingbird-20251124&repository_id=public-hummingbird-aarch64-rpms"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "aarch64"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "haproxy-main@src",
          "product" : {
            "name" : "haproxy-main@src",
            "product_id" : "haproxy-main@src",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/haproxy@3.0.19-1.1.hum1?arch=src&distro=hummingbird-20251124&repository_id=public-hummingbird-source-rpms"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "src"
      }, {
        "branches" : [ {
          "category" : "product_version",
          "name" : "haproxy-main@x86_64",
          "product" : {
            "name" : "haproxy-main@x86_64",
            "product_id" : "haproxy-main@x86_64",
            "product_identification_helper" : {
              "purl" : "pkg:rpm/redhat/haproxy@3.0.19-1.1.hum1?arch=x86_64&distro=hummingbird-20251124&repository_id=public-hummingbird-x86_64-rpms"
            }
          }
        } ],
        "category" : "architecture",
        "name" : "x86_64"
      } ],
      "category" : "vendor",
      "name" : "Red Hat"
    } ],
    "relationships" : [ {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "haproxy-main@aarch64 as a component of Red Hat Hardened Images",
        "product_id" : "Red Hat Hardened Images:haproxy-main@aarch64"
      },
      "product_reference" : "haproxy-main@aarch64",
      "relates_to_product_reference" : "Red Hat Hardened Images"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "haproxy-main@src as a component of Red Hat Hardened Images",
        "product_id" : "Red Hat Hardened Images:haproxy-main@src"
      },
      "product_reference" : "haproxy-main@src",
      "relates_to_product_reference" : "Red Hat Hardened Images"
    }, {
      "category" : "default_component_of",
      "full_product_name" : {
        "name" : "haproxy-main@x86_64 as a component of Red Hat Hardened Images",
        "product_id" : "Red Hat Hardened Images:haproxy-main@x86_64"
      },
      "product_reference" : "haproxy-main@x86_64",
      "relates_to_product_reference" : "Red Hat Hardened Images"
    } ]
  },
  "vulnerabilities" : [ {
    "cve" : "CVE-2026-33555",
    "cwe" : {
      "id" : "CWE-130",
      "name" : "Improper Handling of Length Parameter Inconsistency"
    },
    "discovery_date" : "2026-04-13T17:01:00.042016+00:00",
    "ids" : [ {
      "system_name" : "Red Hat Bugzilla ID",
      "text" : "2457920"
    } ],
    "notes" : [ {
      "category" : "description",
      "text" : "A flaw was found in HAProxy. A remote attacker could exploit this vulnerability by sending a specially crafted HTTP/3 request. The HTTP/3 parser fails to verify that the received body length matches the announced content-length when a stream is closed with an empty payload. This desynchronization with the backend server can lead to request smuggling, allowing an attacker to bypass security mechanisms and potentially access unauthorized resources.",
      "title" : "Vulnerability description"
    }, {
      "category" : "summary",
      "text" : "haproxy: HAProxy: Request smuggling via HTTP/3 parser desynchronization",
      "title" : "Vulnerability summary"
    }, {
      "category" : "general",
      "text" : "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
      "title" : "CVSS score applicability"
    } ],
    "product_status" : {
      "fixed" : [ "Red Hat Hardened Images:haproxy-main@aarch64", "Red Hat Hardened Images:haproxy-main@src", "Red Hat Hardened Images:haproxy-main@x86_64" ]
    },
    "references" : [ {
      "category" : "self",
      "summary" : "Canonical URL",
      "url" : "https://access.redhat.com/security/cve/CVE-2026-33555"
    }, {
      "category" : "external",
      "summary" : "RHBZ#2457920",
      "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2457920"
    }, {
      "category" : "external",
      "summary" : "https://www.cve.org/CVERecord?id=CVE-2026-33555",
      "url" : "https://www.cve.org/CVERecord?id=CVE-2026-33555"
    }, {
      "category" : "external",
      "summary" : "https://nvd.nist.gov/vuln/detail/CVE-2026-33555",
      "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-33555"
    }, {
      "category" : "external",
      "summary" : "https://github.com/haproxy/haproxy/commit/05a295441c621089ffa4318daf0dbca2dd756a84",
      "url" : "https://github.com/haproxy/haproxy/commit/05a295441c621089ffa4318daf0dbca2dd756a84"
    }, {
      "category" : "external",
      "summary" : "https://www.haproxy.com/documentation/haproxy-aloha/changelog/",
      "url" : "https://www.haproxy.com/documentation/haproxy-aloha/changelog/"
    }, {
      "category" : "external",
      "summary" : "https://www.haproxy.org",
      "url" : "https://www.haproxy.org"
    }, {
      "category" : "external",
      "summary" : "https://www.mail-archive.com/haproxy@formilux.org/msg46752.html",
      "url" : "https://www.mail-archive.com/haproxy@formilux.org/msg46752.html"
    } ],
    "release_date" : "2026-04-13T00:00:00+00:00",
    "remediations" : [ {
      "category" : "vendor_fix",
      "date" : "2026-04-17T11:19:38+00:00",
      "details" : "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
      "product_ids" : [ "Red Hat Hardened Images:haproxy-main@aarch64", "Red Hat Hardened Images:haproxy-main@src", "Red Hat Hardened Images:haproxy-main@x86_64" ],
      "restart_required" : {
        "category" : "none"
      },
      "url" : "https://access.redhat.com/errata/RHSA-2026:8749"
    }, {
      "category" : "workaround",
      "details" : "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
      "product_ids" : [ "Red Hat Hardened Images:haproxy-main@aarch64", "Red Hat Hardened Images:haproxy-main@src", "Red Hat Hardened Images:haproxy-main@x86_64" ]
    } ],
    "scores" : [ {
      "cvss_v3" : {
        "attackComplexity" : "HIGH",
        "attackVector" : "NETWORK",
        "availabilityImpact" : "NONE",
        "baseScore" : 4.0,
        "baseSeverity" : "MEDIUM",
        "confidentialityImpact" : "NONE",
        "integrityImpact" : "LOW",
        "privilegesRequired" : "NONE",
        "scope" : "CHANGED",
        "userInteraction" : "NONE",
        "vectorString" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N",
        "version" : "3.1"
      },
      "products" : [ "Red Hat Hardened Images:haproxy-main@aarch64", "Red Hat Hardened Images:haproxy-main@src", "Red Hat Hardened Images:haproxy-main@x86_64" ]
    } ],
    "threats" : [ {
      "category" : "impact",
      "details" : "Moderate"
    } ],
    "title" : "haproxy: HAProxy: Request smuggling via HTTP/3 parser desynchronization"
  } ]
}