Summary
Workarounds
If you cannot upgrade, make sure that you are not using the Authentication header, either directly or through some third-party plugin.
If you need to use that header in some requests, add "dont_redirect": True to the request.meta dictionary of those requests to disable following redirects for them.
If you need to keep (same domain) redirect support on those requests, make sure you trust the target website not to redirect your requests to a different domain.
Acknowledgements
This security issue was reported by @ranjit-git through huntr.com.
Impact
When you send a request with the Authorization header to one domain, and the response asks to redirect to a different domain, Scrapy’s built-in redirect middleware creates a follow-up redirect request that keeps the original Authorization header, leaking its content to that second domain.
The right behavior would be to drop the Authorization header instead, in this scenario.
CVE-2024-3574 has a CVSS score of 7.5 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (2.11.1, 1.8.4); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Remediation advice
Upgrade to Scrapy 2.11.1.
If you are using Scrapy 1.8 or a lower version, and upgrading to Scrapy 2.11.1 is not an option, you may upgrade to Scrapy 1.8.4 instead.
Frequently Asked Questions
- What is CVE-2024-3574? CVE-2024-3574 is a high-severity security vulnerability in scrapy (pip), affecting versions >= 2, < 2.11.1. It is fixed in 2.11.1, 1.8.4.
- How severe is CVE-2024-3574? CVE-2024-3574 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of scrapy are affected by CVE-2024-3574? scrapy (pip) versions >= 2, < 2.11.1 is affected.
- Is there a fix for CVE-2024-3574? Yes. CVE-2024-3574 is fixed in 2.11.1, 1.8.4. Upgrade to this version or later.
- Is CVE-2024-3574 exploitable, and should I be worried? Whether CVE-2024-3574 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2024-3574 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2024-3574?
- Upgrade
scrapyto 2.11.1 or later - Upgrade
scrapyto 1.8.4 or later
- Upgrade