GHSA-76g3-c3x4-crvx: scrapy (CVE-2026-84366)

Package	Ecosystem	Affected	Fixed in
scrapy	PyPI	<2.17	2.17

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Scrapy versions before 2.17 are affected: the S3DownloadHandler converts s3:// requests to plaintext HTTP by default and signs them with configured AWS credentials. A network attacker able to observe traffic between Scrapy and S3, or an active man-in-the-middle, can read the signed request and its authorization headers, and can alter responses before Scrapy processes them. Upgrade to Scrapy 2.17 or later. The source gives no other workaround.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.4	High	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0025, the 17th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:10 UTC First seen by agentprime
31 Oct 2026, 14:10 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.