{"id":"GHSA-823f-cwm9-4g74","summary":"Splash authentication credentials potentially leaked to target websites ","details":"### Impact\n\nIf you use [`HttpAuthMiddleware`](http://doc.scrapy.org/en/latest/topics/downloader-middleware.html#module-scrapy.downloadermiddlewares.httpauth) (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`.\n\n### Patches\n\nUpgrade to scrapy-splash 0.8.0 and use the new `SPLASH_USER` and `SPLASH_PASS` settings instead to set your Splash authentication credentials safely.\n\n### Workarounds\n\nIf you cannot upgrade, set your Splash request credentials on a per-request basis, [using the `splash_headers` request parameter](https://github.com/scrapy-plugins/scrapy-splash/tree/0.8.x#http-basic-auth), instead of defining them globally using the [`HttpAuthMiddleware`](http://doc.scrapy.org/en/latest/topics/downloader-middleware.html#module-scrapy.downloadermiddlewares.httpauth).\n\nAlternatively, make sure all your requests go through Splash. That includes disabling the [robots.txt middleware](https://docs.scrapy.org/en/latest/topics/downloader-middleware.html#topics-dlmw-robots).\n\n### For more information\nIf you have any questions or comments about this advisory:\n* [Open an issue](https://github.com/scrapy-plugins/scrapy-splash/issues)\n* [Email us](mailto:opensource@zyte.com)\n","aliases":["CVE-2021-41124","PYSEC-2021-364"],"modified":"2026-07-08T06:27:36.138107661Z","published":"2021-10-06T17:49:23Z","database_specific":{"cwe_ids":["CWE-200"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2021-10-05T21:11:11Z","nvd_published_at":"2021-10-05T21:15:00Z"},"references":[{"type":"WEB","url":"https://github.com/scrapy-plugins/scrapy-splash/security/advisories/GHSA-823f-cwm9-4g74"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41124"},{"type":"WEB","url":"https://github.com/scrapy-plugins/scrapy-splash/commit/2b253e57fe64ec575079c8cdc99fe2013502ea31"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/scrapy-splash/PYSEC-2021-364.yaml"},{"type":"PACKAGE","url":"https://github.com/scrapy-plugins/scrapy-splash"},{"type":"WEB","url":"https://github.com/scrapy-plugins/scrapy-splash/releases/tag/0.8.0"}],"affected":[{"package":{"name":"scrapy-splash","ecosystem":"PyPI","purl":"pkg:pypi/scrapy-splash"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.0"}]}],"versions":["0.2","0.3","0.4","0.5","0.6","0.6.1","0.7","0.7.1","0.7.2"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/10/GHSA-823f-cwm9-4g74/GHSA-823f-cwm9-4g74.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N"}]}