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PYSEC-2021-108

Details

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI / urllib3

Introduced in: 0 Fixed in: 2d4a3fee6de2fa45eb82169361918f759269b4ec

Fix pip install --upgrade 'urllib3>=2d4a3fee6de2fa45eb82169361918f759269b4ec'

References

https://github.com/advisories/GHSA-q2q7-5pp4-w6pg [ADVISORY]
https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ec [FIX]