CVE-2021-33503

An issue was discovered in urllib3 before 1.26.5

published June 29, 2021

CVSS
—
EPSS
3%
Percentile
88.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.03273 · 88.3th percentile
Published
2021-06-29T10:55Z
EPSS history
Timeline
  • 29 JUN 10:55Z
    An issue was discovered in urllib3 before 1.26.5
    cvelistv5