{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-3634 Libsoup: libsoup: http header injection and response splitting via crlf injection in content-type header - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-3634.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Libsoup: libsoup: http header injection and response splitting via crlf injection in content-type header",
    "tracking": {
      "current_release_date": "2026-03-31T15:07:02.000Z",
      "generator": {
        "date": "2026-04-01T07:38:22.467Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-3634",
      "initial_release_date": "2026-03-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-03-21T01:02:26.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2026-03-31T15:07:02.000Z",
          "legacy_version": "2",
          "number": "2",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "2.0",
                "product": {
                  "name": "CBL Mariner 2.0",
                  "product_id": "17086"
                }
              },
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "cbl2 libsoup 3.0.4-12",
                "product": {
                  "name": "cbl2 libsoup 3.0.4-12",
                  "product_id": "4"
                }
              },
              {
                "category": "product_version_range",
                "name": "azl3 libsoup 3.4.4-14",
                "product": {
                  "name": "azl3 libsoup 3.4.4-14",
                  "product_id": "2"
                }
              },
              {
                "category": "product_version_range",
                "name": "cbl2 libsoup 3.0.4-13",
                "product": {
                  "name": "cbl2 libsoup 3.0.4-13",
                  "product_id": "1"
                }
              },
              {
                "category": "product_version_range",
                "name": "azl3 libsoup 3.4.4-12",
                "product": {
                  "name": "azl3 libsoup 3.4.4-12",
                  "product_id": "3"
                }
              }
            ],
            "category": "product_name",
            "name": "libsoup"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 libsoup 3.0.4-12 as a component of CBL Mariner 2.0",
          "product_id": "17086-4"
        },
        "product_reference": "4",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 libsoup 3.4.4-14 as a component of Azure Linux 3.0",
          "product_id": "17084-2"
        },
        "product_reference": "2",
        "relates_to_product_reference": "17084"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 libsoup 3.0.4-13 as a component of CBL Mariner 2.0",
          "product_id": "17086-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 libsoup 3.4.4-12 as a component of Azure Linux 3.0",
          "product_id": "17084-3"
        },
        "product_reference": "3",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-3634",
      "cwe": {
        "id": "CWE-93",
        "name": "Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027)"
      },
      "notes": [
        {
          "category": "general",
          "text": "redhat",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "known_affected": [
          "17086-4",
          "17084-2",
          "17086-1",
          "17084-3"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-3634 Libsoup: libsoup: http header injection and response splitting via crlf injection in content-type header - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-3634.json"
        }
      ],
      "remediations": [
        {
          "category": "none_available",
          "date": "2026-03-21T01:02:26.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17086-4"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-03-21T01:02:26.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-2"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-03-21T01:02:26.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17086-1"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-03-21T01:02:26.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-3"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 3.9,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "environmentalsScore": 0.0,
            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "temporalScore": 3.9,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          "products": [
            "17086-4",
            "17084-2",
            "17086-1",
            "17084-3"
          ]
        }
      ],
      "title": "Libsoup: libsoup: http header injection and response splitting via crlf injection in content-type header"
    }
  ]
}