{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-5773",
        "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "state": "PUBLISHED",
        "assignerShortName": "curl",
        "dateReserved": "2026-04-08T06:51:05.356Z",
        "datePublished": "2026-05-13T08:27:42.342Z",
        "dateUpdated": "2026-09-15T06:03:00.894Z"
    },
    "containers": {
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                "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
                "shortName": "curl",
                "dateUpdated": "2026-09-15T06:03:00.894Z"
            },
            "title": "wrong reuse of SMB connection",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "libcurl might in some circumstances reuse the wrong connection for SMB(S)\ntransfers.\n\nlibcurl features a pool of recent connections so that subsequent requests can\nreuse an existing connection to avoid overhead.\n\nWhen reusing a connection a range of criteria must be met. Due to a logical\nerror in the code, a network transfer operation that was requested by an\napplication could wrongfully reuse an existing SMB connection to the same\nserver that was using a different \"share\" than the new subsequent transfer\nshould.\n\nThis could in unlucky situations lead to the download of the wrong file or the\nupload of a file to the wrong place. When this happens, the same credentials\nare used and the server name is the same."
                }
            ],
            "affected": [
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                    "vendor": "curl",
                    "product": "curl",
                    "versions": [
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                            "status": "affected",
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                            "lessThan": "8.14.2"
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                        {
                            "version": "8.15.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "8.16.1"
                        },
                        {
                            "version": "8.17.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "8.20.0"
                        }
                    ],
                    "defaultStatus": "unaffected"
                },
                {
                    "vendor": "curl",
                    "product": "curl",
                    "versions": [
                        {
                            "version": "aec2e865f06669b9cb5d26cc1148d70bc418b163",
                            "status": "affected",
                            "versionType": "git",
                            "lessThan": "74a169575d6412dc0ff532acdf94de35a6c2a571"
                        }
                    ],
                    "defaultStatus": "unaffected",
                    "repo": "https://github.com/curl/curl.git"
                },
                {
                    "vendor": "curl",
                    "product": "curl",
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                            "version": "8.19.0",
                            "status": "affected"
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                        {
                            "version": "8.18.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.17.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.16.0",
                            "status": "affected"
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                        {
                            "version": "8.15.0",
                            "status": "affected"
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                        {
                            "version": "8.14.1",
                            "status": "affected"
                        },
                        {
                            "version": "8.14.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.13.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.12.1",
                            "status": "affected"
                        },
                        {
                            "version": "8.12.0",
                            "status": "affected"
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                            "version": "8.11.1",
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                        {
                            "version": "8.10.0",
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                        {
                            "version": "8.9.0",
                            "status": "affected"
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                        {
                            "version": "8.8.0",
                            "status": "affected"
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                        {
                            "version": "8.7.1",
                            "status": "affected"
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                        {
                            "version": "8.7.0",
                            "status": "affected"
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                        {
                            "version": "8.6.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.5.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.4.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.3.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "8.2.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "8.1.1",
                            "status": "affected"
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                        {
                            "version": "8.1.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.0.1",
                            "status": "affected"
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                        {
                            "version": "8.0.0",
                            "status": "affected"
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                        {
                            "version": "7.88.1",
                            "status": "affected"
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                        {
                            "version": "7.88.0",
                            "status": "affected"
                        },
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                            "version": "7.86.0",
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                            "status": "affected"
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                            "version": "7.79.0",
                            "status": "affected"
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                            "version": "7.78.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.77.0",
                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                        {
                            "version": "7.74.0",
                            "status": "affected"
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                        {
                            "version": "7.73.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.72.0",
                            "status": "affected"
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                        {
                            "version": "7.71.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.71.0",
                            "status": "affected"
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                        {
                            "version": "7.70.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.69.1",
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                        },
                        {
                            "version": "7.69.0",
                            "status": "affected"
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                        {
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
                        },
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                            "version": "7.62.0",
                            "status": "affected"
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                        {
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                            "status": "affected"
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                        {
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                            "version": "7.56.0",
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                        {
                            "version": "7.55.0",
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                            "status": "affected"
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                            "status": "affected"
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                            "status": "affected"
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                            "version": "7.42.0",
                            "status": "affected"
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                        {
                            "version": "7.41.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.40.0",
                            "status": "affected"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "references": [
                {
                    "url": "https://curl.se/docs/CVE-2026-5773.json"
                },
                {
                    "url": "https://curl.se/docs/CVE-2026-5773.html"
                },
                {
                    "url": "https://hackerone.com/reports/3650689"
                }
            ],
            "x_osv": {
                "schema_version": "1.5.0",
                "id": "CURL-CVE-2026-5773",
                "aliases": [
                    "CVE-2026-5773"
                ],
                "summary": "wrong reuse of SMB connection",
                "modified": "2026-09-07T10:34:51.00Z",
                "database_specific": {
                    "package": "curl",
                    "affects": "both",
                    "URL": "https://curl.se/docs/CVE-2026-5773.json",
                    "www": "https://curl.se/docs/CVE-2026-5773.html",
                    "issue": "https://hackerone.com/reports/3650689",
                    "CWE": {
                        "id": "CWE-488",
                        "desc": "Exposure of Data Element to Wrong Session"
                    },
                    "last_affected": "8.19.0",
                    "severity": "Low"
                },
                "published": "2026-04-29T08:00:00.00Z",
                "affected": [
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                        "ranges": [
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                                "type": "SEMVER",
                                "events": [
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                                        "introduced": "7.40.0"
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                                        "introduced": "8.15.0"
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                                "repo": "https://github.com/curl/curl.git",
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                            "8.16.0",
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                            "8.14.1",
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                            "8.1.2",
                            "8.1.1",
                            "8.1.0",
                            "8.0.1",
                            "8.0.0",
                            "7.88.1",
                            "7.88.0",
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                            "7.86.0",
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                ],
                "credits": [
                    {
                        "name": "Osama Hamad",
                        "type": "finder"
                    },
                    {
                        "name": "Daniel Stenberg",
                        "type": "remediation developer"
                    }
                ],
                "details": "libcurl might in some circumstances reuse the wrong connection for SMB(S)\ntransfers.\n\nlibcurl features a pool of recent connections so that subsequent requests can\nreuse an existing connection to avoid overhead.\n\nWhen reusing a connection a range of criteria must be met. Due to a logical\nerror in the code, a network transfer operation that was requested by an\napplication could wrongfully reuse an existing SMB connection to the same\nserver that was using a different \"share\" than the new subsequent transfer\nshould.\n\nThis could in unlucky situations lead to the download of the wrong file or the\nupload of a file to the wrong place. When this happens, the same credentials\nare used and the server name is the same."
            },
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                            "description": "Exposure of Data Element to Wrong Session",
                            "cweId": "CWE-488",
                            "type": "CWE"
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                    "value": "Osama Hamad",
                    "type": "finder"
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                    "value": "Daniel Stenberg",
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                }
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        "adp": [
            {
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "http://www.openwall.com/lists/oss-security/2026/04/29/9"
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                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 7.5,
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}