{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-84366",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-01T16:27:58.129Z",
        "datePublished": "2026-09-01T20:29:23.143Z",
        "dateUpdated": "2026-09-01T20:29:23.143Z"
    },
    "containers": {
        "cna": {
            "title": "Scrapy: S3DownloadHandler sends signed S3 requests over plaintext HTTP by default",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-319",
                            "lang": "en",
                            "description": "CWE-319: Cleartext Transmission of Sensitive Information",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 7.4,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/scrapy/scrapy/security/advisories/GHSA-76g3-c3x4-crvx",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/scrapy/scrapy/security/advisories/GHSA-76g3-c3x4-crvx"
                },
                {
                    "name": "https://github.com/scrapy/scrapy/commit/9523e1ec8c41fde265a26d14563d178b6f1ad04b",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/scrapy/scrapy/commit/9523e1ec8c41fde265a26d14563d178b6f1ad04b"
                },
                {
                    "name": "https://github.com/scrapy/scrapy/releases/tag/2.17.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/scrapy/scrapy/releases/tag/2.17.0"
                }
            ],
            "affected": [
                {
                    "vendor": "scrapy",
                    "product": "scrapy",
                    "versions": [
                        {
                            "version": "< 2.17.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-01T20:29:23.143Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Scrapy is a high-level web crawling and scraping framework for Python. Prior to 2.17.0, in scrapy/core/downloader/handlers/s3.py, Scrapy's S3DownloadHandler converts an S3-scheme bucket and key request into a plaintext HTTP request to the corresponding S3 endpoint unless request.meta[\"is_secure\"] is explicitly enabled, then signs and sends the plaintext request with configured AWS credentials. A network attacker who can observe traffic between Scrapy and S3 can read the bucket and key path, AWS Authorization header, X-Amz-Security-Token when temporary credentials are used, S3 object contents, and S3 response headers. An active man-in-the-middle attacker can also modify the plaintext S3 response body, status code, and headers before Scrapy processes them, causing scraped-data poisoning, poisoned exports, HTTP cache poisoning when caching is enabled, or influence over later crawl targets through forged redirects or attacker-controlled links. Users making S3-scheme requests with AWS credentials are affected. This issue is fixed in version 2.17.0."
                }
            ],
            "source": {
                "advisory": "GHSA-76g3-c3x4-crvx",
                "discovery": "UNKNOWN"
            }
        }
    }
}