Security Advisory
CVE-2021-33503
7.5
HIGH
Vulnerability Description
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.
Published Date
June 29, 2021
Official Source
NIST NVD Advisory