Splash authentication credentials potentially leaked to target websites
Impact
If you use HttpAuthMiddleware (i.e. the http_user and http_pass spider attributes) for Splash authentication, any non-Splash request will expose your credentials to the request target. This includes robots.txt requests sent by Scrapy when the ROBOTSTXT_OBEY setting is set to True.
Patches
Upgrade to scrapy-splash 0.8.0 and use the new SPLASH_USER and SPLASH_PASS settings instead to set your Splash authentication credentials safely.
Workarounds
If you cannot upgrade, set your Splash request credentials on a per-request basis, using the splash_headers request parameter, instead of defining them globally using the HttpAuthMiddleware.
Alternatively, make sure all your requests go through Splash. That includes disabling the robots.txt middleware.
For more information
If you have any questions or comments about this advisory:
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | scrapy-splash | < 0.8.0 | 0.8.0 |
References
- https://github.com/scrapy-plugins/scrapy-splash/commit/2b253e57fe64ec575079c8cdc99fe2013502ea31
- https://github.com/scrapy-plugins/scrapy-splash/security/advisories/GHSA-823f-cwm9-4g74
- https://nvd.nist.gov/vuln/detail/CVE-2021-41124
- https://github.com/pypa/advisory-database/tree/main/vulns/scrapy-splash/PYSEC-2021-364.yaml
- https://github.com/scrapy-plugins/scrapy-splash
- https://github.com/scrapy-plugins/scrapy-splash/releases/tag/0.8.0
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N- Weakness (CWE)
CWE-200- Platform
- Python (PyPI)
- Package
scrapy-splash- Disclosed
- 05.10.2021
- Updated
- 11.10.2026 13:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2021-364 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-823f-cwm9-4g74 - CC BY 4.0
Vulnerability history: scrapy-splash
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.