{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-11352",
        "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "state": "PUBLISHED",
        "assignerShortName": "curl",
        "dateReserved": "2026-06-05T11:23:43.389Z",
        "datePublished": "2026-07-03T06:12:10.777Z",
        "dateUpdated": "2026-09-15T06:02:38.244Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
                "shortName": "curl",
                "dateUpdated": "2026-09-15T06:02:38.244Z"
            },
            "title": "QUIC zero-length UDP datagrams busy-loop",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server\nto trigger a remote denial of service against a curl or libcurl client.\nBecause the helper function discards zero-length UDP datagrams before counting\nthem toward the per-call packet budget, a connected QUIC peer can continuously\nstream empty datagrams to indefinitely stall the client."
                }
            ],
            "affected": [
                {
                    "vendor": "curl",
                    "product": "curl",
                    "versions": [
                        {
                            "version": "8.18.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "8.20.1"
                        }
                    ],
                    "defaultStatus": "unaffected"
                },
                {
                    "vendor": "curl",
                    "product": "curl",
                    "versions": [
                        {
                            "version": "6a3d0b6d631d5e9bec797306b5b41a9f440a088d",
                            "status": "affected",
                            "versionType": "git",
                            "lessThan": "56eca2afb4806f1032872fa97d1834b3c1385276"
                        }
                    ],
                    "defaultStatus": "unaffected",
                    "repo": "https://github.com/curl/curl.git"
                },
                {
                    "vendor": "curl",
                    "product": "curl",
                    "versions": [
                        {
                            "version": "8.20.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.19.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.18.0",
                            "status": "affected"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "references": [
                {
                    "url": "https://curl.se/docs/CVE-2026-11352.json"
                },
                {
                    "url": "https://curl.se/docs/CVE-2026-11352.html"
                },
                {
                    "url": "https://hackerone.com/reports/3783438"
                }
            ],
            "x_osv": {
                "schema_version": "1.5.0",
                "id": "CURL-CVE-2026-11352",
                "aliases": [
                    "CVE-2026-11352"
                ],
                "summary": "QUIC zero-length UDP datagrams busy-loop",
                "modified": "2026-09-07T10:34:51.00Z",
                "database_specific": {
                    "package": "curl",
                    "affects": "both",
                    "URL": "https://curl.se/docs/CVE-2026-11352.json",
                    "www": "https://curl.se/docs/CVE-2026-11352.html",
                    "issue": "https://hackerone.com/reports/3783438",
                    "CWE": {
                        "id": "CWE-835",
                        "desc": "Loop with Unreachable Exit Condition ('Infinite Loop')"
                    },
                    "last_affected": "8.20.0",
                    "severity": "Low"
                },
                "published": "2026-06-24T08:00:00.00Z",
                "affected": [
                    {
                        "ranges": [
                            {
                                "type": "SEMVER",
                                "events": [
                                    {
                                        "introduced": "8.18.0"
                                    },
                                    {
                                        "fixed": "8.20.1"
                                    }
                                ]
                            },
                            {
                                "type": "GIT",
                                "repo": "https://github.com/curl/curl.git",
                                "events": [
                                    {
                                        "introduced": "6a3d0b6d631d5e9bec797306b5b41a9f440a088d"
                                    },
                                    {
                                        "fixed": "56eca2afb4806f1032872fa97d1834b3c1385276"
                                    }
                                ]
                            }
                        ],
                        "versions": [
                            "8.20.0",
                            "8.19.0",
                            "8.18.0"
                        ]
                    }
                ],
                "credits": [
                    {
                        "name": "vectorqueue on hackerone (AntAISecurityLab)",
                        "type": "finder"
                    },
                    {
                        "name": "Stefan Eissing",
                        "type": "remediation developer"
                    }
                ],
                "details": "An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server\nto trigger a remote denial of service against a curl or libcurl client.\nBecause the helper function discards zero-length UDP datagrams before counting\nthem toward the per-call packet budget, a connected QUIC peer can continuously\nstream empty datagrams to indefinitely stall the client."
            },
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Loop with Unreachable Exit Condition ('Infinite Loop')",
                            "cweId": "CWE-835",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "vectorqueue on hackerone (AntAISecurityLab)",
                    "type": "finder"
                },
                {
                    "lang": "en",
                    "value": "Stefan Eissing",
                    "type": "remediation developer"
                }
            ],
            "x_generator": {
                "engine": "cvelib 1.8.0"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://hackerone.com/reports/3783438",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 7.5,
                            "attackVector": "NETWORK",
                            "baseSeverity": "HIGH",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                            "integrityImpact": "NONE",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "HIGH",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "NONE"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-06T18:26:03.249042Z",
                                "id": "CVE-2026-11352",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-07-06T18:27:49.432Z"
                }
            }
        ]
    }
}