{"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"}}}}

{}

{"affected": [{"affectedData": [{"product": "scrapy", "vendor": "scrapy", "versions": [{"status": "affected", "version": "< 2.17.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-84366", "lastModified": "2026-09-01T21:18:47.593", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.2, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-01T21:18:47.593", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/scrapy/scrapy/commit/9523e1ec8c41fde265a26d14563d178b6f1ad04b"}, {"source": "security-advisories@github.com", "url": "https://github.com/scrapy/scrapy/releases/tag/2.17.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/scrapy/scrapy/security/advisories/GHSA-76g3-c3x4-crvx"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-319"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}