Information disclosure in scrapy - #VU127076
Published: July 25, 2022 / Updated: April 23, 2026
Vulnerability identifier: #VU127076
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
scrapy
scrapy
Software vendor:
scrapy.org
scrapy.org
Description
The vulnerability allows a remote attacker to disclose proxy credentials to a different proxy.
The vulnerability exists due to improper handling of authentication headers in the built-in HTTP proxy downloader middleware when processing requests whose proxy metadata is changed during retries or redirects. A remote attacker can use a proxy-rotation setup that changes proxy metadata without clearing the previous authentication header to disclose proxy credentials to a different proxy.
The issue affects environments that rotate proxies from different proxy providers and where at least one proxy requires credentials.
Remediation
Install security update from vendor's website.