{"id":"DEBIAN-CVE-2026-84366","details":"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.","modified":"2026-09-10T08:47:24.098330071Z","published":"2026-09-01T21:18:47.593Z","upstream":["CVE-2026-84366"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-84366"}],"affected":[{"package":{"name":"python-scrapy","ecosystem":"Debian:12","purl":"pkg:deb/debian/python-scrapy?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.0-1","2.11.0-1","2.11.0-2","2.11.1-1","2.11.1-2","2.11.2-1","2.11.2-2","2.11.2-3","2.12.0-1","2.12.0-2","2.13.1-1~exp1","2.13.3-1","2.13.3-1~exp1","2.13.4-1","2.13.4-2","2.14.0-1","2.14.1-1","2.14.2-1","2.15.1-1","2.16.0-1","2.16.0-2","2.17.0-1","2.18.0-1","2.8.0-2","2.9.0-1","2.9.0-1~exp1","2.9.0-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84366.json"}},{"package":{"name":"python-scrapy","ecosystem":"Debian:13","purl":"pkg:deb/debian/python-scrapy?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.0-2","2.13.1-1~exp1","2.13.3-1","2.13.3-1~exp1","2.13.4-1","2.13.4-2","2.14.0-1","2.14.1-1","2.14.2-1","2.15.1-1","2.16.0-1","2.16.0-2","2.17.0-1","2.18.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84366.json"}},{"package":{"name":"python-scrapy","ecosystem":"Debian:14","purl":"pkg:deb/debian/python-scrapy?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.17.0-1"}]}],"versions":["2.12.0-2","2.13.1-1~exp1","2.13.3-1","2.13.3-1~exp1","2.13.4-1","2.13.4-2","2.14.0-1","2.14.1-1","2.14.2-1","2.15.1-1","2.16.0-1","2.16.0-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84366.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}