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cvelistMitreCVELIST:CVE-2021-33503
HistoryJun 29, 2021 - 10:55 a.m.

CVE-2021-33503

2021-06-2910:55:35
mitre
www.cve.org
1

7.7 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

69.2%

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.