{
  "document": {
    "aggregate_severity": {
      "text": "Medium"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "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 Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
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        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/almalinux9.2esu/vex/2026/cve-2026-33555-els_os-almalinux9_2esu.json"
      }
    ],
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      "generator": {
        "date": "2026-08-07T13:44:53Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2026-33555-ELS_OS-ALMALINUX9.2ESU",
      "initial_release_date": "2026-04-13T17:16:00Z",
      "revision_history": [
        {
          "date": "2026-04-13T17:16:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-07-28T13:15:18Z",
          "number": "2",
          "summary": "Official Publication"
        },
        {
          "date": "2026-08-07T13:44:53Z",
          "number": "3",
          "summary": "Update document"
        }
      ],
      "status": "final",
      "version": "3"
    },
    "title": "Security update on CVE-2026-33555"
  },
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        "name": "AlmaLinux OS Foundation"
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        "relates_to_product_reference": "AlmaLinux-9.2"
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-33555",
      "cwe": {
        "id": "CWE-130",
        "name": "Improper Handling of Length Parameter Inconsistency"
      },
      "notes": [
        {
          "category": "description",
          "text": "An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches a previously announced content-length when the stream is closed via a frame with an empty payload. This can cause desynchronization issues with the backend server and could be used for request smuggling. The earliest affected version is 2.6.",
          "title": "Vulnerability description"
        },
        {
          "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"
        },
        {
          "category": "other",
          "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.",
          "title": "Statement"
        }
      ],
      "product_status": {
        "known_not_affected": [
          "AlmaLinux-9.2:haproxy-0:2.4.17-6.el9.tuxcare.els1.x86_64",
          "AlmaLinux-9.2:haproxy-0:2.4.17-6.el9.tuxcare.els3.x86_64",
          "AlmaLinux-9.2:haproxy-0:2.4.17-6.el9.tuxcare.els4.x86_64",
          "AlmaLinux-9.2:haproxy-0:2.4.17-6.el9.tuxcare.els5.x86_64",
          "AlmaLinux-9.2:haproxy-0:2.4.17-6.el9.tuxcare.els6.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/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://r3verii.github.io/cve/2026/04/14/haproxy-h3-standalone-fin-smuggling.html",
          "url": "https://r3verii.github.io/cve/2026/04/14/haproxy-h3-standalone-fin-smuggling.html"
        },
        {
          "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": "2026-04-13T17:16:00Z",
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
            "version": "3.1"
          },
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        },
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          "category": "impact",
          "date": "2026-08-07T12:01:55.579234Z",
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}