{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "All information products included in [https://github.com/cisagov/CSAF/tree/develop/csaf_files/IT/white](https://github.com/cisagov/CSAF/tree/develop/csaf_files/IT/white) are provided \\\"as is\\\" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see [https://us-cert.cisa.gov/tlp/](https://us-cert.cisa.gov/tlp/).",
        "title": "Legal Notice"
      },
      {
        "category": "other",
        "text": "Worldwide",
        "title": "Countries and Areas Deployed"
      },
      {
        "category": "other",
        "text": "Information Technology",
        "title": "Critical Infrastructure Sectors"
      },
      {
        "category": "summary",
        "text": "CryptPad 2025.3.1 allows unbounded WebSocket frame flood. A remote, unauthenticated attacker can significantly degrade or deny service for all users of a CryptPad instance.",
        "title": "Risk Evaluation"
      },
      {
        "category": "general",
        "text": "Upgrade to 2026.2.2.",
        "title": "Recommended Practices"
      },
      {
        "category": "other",
        "text": "United States",
        "title": "Company Headquarters Location"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "https://www.cisa.gov/report",
      "issuing_authority": "CISA",
      "name": "CISA",
      "namespace": "https://www.cisa.gov/"
    },
    "references": [
      {
        "category": "self",
        "summary": "Vulnerability Advisory VA-26-119-01 CSAF",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-119-01.json"
      }
    ],
    "title": "CryptPad unbounded WebSocket frame flood",
    "tracking": {
      "current_release_date": "2026-04-29T00:00:00Z",
      "generator": {
        "engine": {
          "name": "VINCE-NT",
          "version": "1.14.0+build.69"
        }
      },
      "id": "VA-26-119-01",
      "initial_release_date": "2026-04-29T00:00:00Z",
      "revision_history": [
        {
          "date": "2026-04-29T00:00:00Z",
          "number": "1.0.0",
          "summary": "Initial publication"
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003e=2025.3.1|\u003c2026.2.2",
                "product": {
                  "name": "CryptPad CryptPad \u003e=2025.3.1|\u003c2026.2.2",
                  "product_id": "CSAFPID-0001"
                }
              },
              {
                "category": "product_version",
                "name": "2026.2.2",
                "product": {
                  "name": "CryptPad CryptPad 2026.2.2",
                  "product_id": "CSAFPID-0002"
                }
              }
            ],
            "category": "product_name",
            "name": "CryptPad"
          }
        ],
        "category": "vendor",
        "name": "CryptPad"
      }
    ]
  },
  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            " John Perifanis"
          ],
          "organization": "Unisystems"
        }
      ],
      "cve": "CVE-2025-51846",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "notes": [
        {
          "category": "summary",
          "text": "CryptPad 2025.3.1 allows unbounded WebSocket frame flood. A remote, unauthenticated attacker can significantly degrade or deny service for all users of a CryptPad instance. Fixed in 2026.2.2.",
          "title": "Description"
        },
        {
          "category": "details",
          "text": "SSVCv2/E:N/A:Y/T:P/2026-04-22T15:32:32Z/",
          "title": "SSVC"
        }
      ],
      "product_status": {
        "fixed": [
          "CSAFPID-0002"
        ],
        "known_affected": [
          "CSAFPID-0001"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "github.com",
          "url": "https://github.com/cryptpad/cryptpad/pull/2239/changes/1e0c06ad8a0c5dab795f85f9730ec2693320c62e"
        },
        {
          "category": "external",
          "summary": "CVE-2025-51846",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-51846"
        },
        {
          "category": "external",
          "summary": "VA-26-119-01 CSAF",
          "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-119-01.json"
        },
        {
          "category": "external",
          "summary": "github.com",
          "url": "https://github.com/JohnPerifanis/cryptpad-cve-2025-51846-advisory/blob/main/README.md"
        }
      ],
      "release_date": "2026-03-25T00:00:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-03-25T00:00:00Z",
          "details": "Fixed in 2026.2.2.",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://github.com/cryptpad/cryptpad/pull/2239/changes/1e0c06ad8a0c5dab795f85f9730ec2693320c62e"
        },
        {
          "category": "vendor_fix",
          "date": "2026-03-25T00:00:00Z",
          "details": "Fixed in 2026.2.2.",
          "product_ids": [
            "CSAFPID-0002"
          ],
          "url": "https://github.com/cryptpad/cryptpad/pull/2239/changes/1e0c06ad8a0c5dab795f85f9730ec2693320c62e"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0001"
          ]
        }
      ],
      "title": "CryptPad unbounded WebSocket frame flood"
    }
  ]
}