Scrapy: S3DownloadHandler sends signed S3 requests over plaintext HTTP by default

Date Sep 2, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product PyPI ยท scrapy
CVE CVE-2026-84366
High-risk advisory CVE-2026-84366

Summary

Scrapy: S3DownloadHandler sends signed S3 requests over plaintext HTTP by default

Why it matters

GitHub has published a reviewed security advisory for scrapy. Prioritize it with other application dependency updates, especially because EPSS places it in the 5% percentile.

Operator check

Check whether scrapy is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.2%; percentile: 5%.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.