{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80255",
        "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "state": "PUBLISHED",
        "assignerShortName": "curl",
        "dateReserved": "2026-08-26T06:25:58.220Z",
        "datePublished": "2026-09-06T17:48:54.275Z",
        "dateUpdated": "2026-09-15T06:03:13.400Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
                "shortName": "curl",
                "dateUpdated": "2026-09-15T06:03:13.400Z"
            },
            "title": "secure cookie attribute bypass with tab",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A `Set-Cookie:` header using tab (horizontal tab, ASCII code 9) instead of\nspace (ascii code 32) immediately before the `Secure` attribute causes curl to\nstore the cookie without its Secure flag. The cookie might then wrongfully be\nsent over plaintext HTTP on subsequent requests to the same host."
                }
            ],
            "affected": [
                {
                    "vendor": "curl",
                    "product": "curl",
                    "versions": [
                        {
                            "version": "8.13.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "8.14.2"
                        },
                        {
                            "version": "8.15.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "8.16.1"
                        },
                        {
                            "version": "8.17.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "8.20.1"
                        },
                        {
                            "version": "8.21.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "8.22.0"
                        }
                    ],
                    "defaultStatus": "unaffected"
                },
                {
                    "vendor": "curl",
                    "product": "curl",
                    "versions": [
                        {
                            "version": "1aea05a6c2699e80c75936d58569851555acd603",
                            "status": "affected",
                            "versionType": "git",
                            "lessThan": "4f6aa41a0145e930e766775dbe860883d350aa0a"
                        }
                    ],
                    "defaultStatus": "unaffected",
                    "repo": "https://github.com/curl/curl.git"
                },
                {
                    "vendor": "curl",
                    "product": "curl",
                    "versions": [
                        {
                            "version": "8.21.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.20.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.19.0",
                            "status": "affected"
                        },
                        {
                            "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"
                        },
                        {
                            "version": "8.14.1",
                            "status": "affected"
                        },
                        {
                            "version": "8.14.0",
                            "status": "affected"
                        },
                        {
                            "version": "8.13.0",
                            "status": "affected"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "references": [
                {
                    "url": "https://curl.se/docs/CVE-2026-80255.json"
                },
                {
                    "url": "https://curl.se/docs/CVE-2026-80255.html"
                },
                {
                    "url": "https://hackerone.com/reports/3972395"
                }
            ],
            "x_osv": {
                "schema_version": "1.5.0",
                "id": "CURL-CVE-2026-80255",
                "aliases": [
                    "CVE-2026-80255"
                ],
                "summary": "secure cookie attribute bypass with tab",
                "modified": "2026-09-07T10:34:51.00Z",
                "database_specific": {
                    "package": "curl",
                    "affects": "both",
                    "URL": "https://curl.se/docs/CVE-2026-80255.json",
                    "www": "https://curl.se/docs/CVE-2026-80255.html",
                    "issue": "https://hackerone.com/reports/3972395",
                    "CWE": {
                        "id": "CWE-201",
                        "desc": "Information Exposure Through Sent Data"
                    },
                    "last_affected": "8.21.0",
                    "severity": "Low"
                },
                "published": "2026-09-02T08:00:00.00Z",
                "affected": [
                    {
                        "ranges": [
                            {
                                "type": "SEMVER",
                                "events": [
                                    {
                                        "introduced": "8.13.0"
                                    },
                                    {
                                        "fixed": "8.14.2"
                                    },
                                    {
                                        "introduced": "8.15.0"
                                    },
                                    {
                                        "fixed": "8.16.1"
                                    },
                                    {
                                        "introduced": "8.17.0"
                                    },
                                    {
                                        "fixed": "8.20.1"
                                    },
                                    {
                                        "introduced": "8.21.0"
                                    },
                                    {
                                        "fixed": "8.22.0"
                                    }
                                ]
                            },
                            {
                                "type": "GIT",
                                "repo": "https://github.com/curl/curl.git",
                                "events": [
                                    {
                                        "introduced": "1aea05a6c2699e80c75936d58569851555acd603"
                                    },
                                    {
                                        "fixed": "4f6aa41a0145e930e766775dbe860883d350aa0a"
                                    }
                                ]
                            }
                        ],
                        "versions": [
                            "8.21.0",
                            "8.20.0",
                            "8.19.0",
                            "8.18.0",
                            "8.17.0",
                            "8.16.0",
                            "8.15.0",
                            "8.14.1",
                            "8.14.0",
                            "8.13.0"
                        ]
                    }
                ],
                "credits": [
                    {
                        "name": "Stanislav Fort (Aisle Research)",
                        "type": "finder"
                    },
                    {
                        "name": "Daniel Stenberg",
                        "type": "remediation developer"
                    }
                ],
                "details": "A `Set-Cookie:` header using tab (horizontal tab, ASCII code 9) instead of\nspace (ascii code 32) immediately before the `Secure` attribute causes curl to\nstore the cookie without its Secure flag. The cookie might then wrongfully be\nsent over plaintext HTTP on subsequent requests to the same host."
            },
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Information Exposure Through Sent Data",
                            "cweId": "CWE-201",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Stanislav Fort (Aisle Research)",
                    "type": "finder"
                },
                {
                    "lang": "en",
                    "value": "Daniel Stenberg",
                    "type": "remediation developer"
                }
            ],
            "x_generator": {
                "engine": "cvelib 1.8.0"
            }
        },
        "adp": [
            {
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "type": "CWE",
                                "cweId": "CWE-201",
                                "lang": "en",
                                "description": "CWE-201 Insertion of Sensitive Information Into Sent Data"
                            }
                        ]
                    }
                ],
                "references": [
                    {
                        "url": "https://hackerone.com/reports/3972395",
                        "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:H/I:N/A:N",
                            "integrityImpact": "NONE",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "NONE",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "HIGH"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-08T18:45:09.883106Z",
                                "id": "CVE-2026-80255",
                                "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": "2026-09-08T18:45:49.180Z"
                }
            }
        ]
    }
}