Vulnerability Database

317,182

Total vulnerabilities in the database

CVE-2022-45061

An issue was discovered in Python before 3.11.1. An unnecessary quadratic algorithm exists in one path when processing some inputs to the IDNA (RFC 3490) decoder, such that a crafted, unreasonably long name being presented to the decoder could lead to a CPU denial of service. Hostnames are often supplied by remote servers that could be controlled by a malicious actor; in such a scenario, they could trigger excessive CPU consumption on the client attempting to make use of an attacker-supplied supposed hostname. For example, the attack payload could be placed in the Location header of an HTTP response with status code 302. A fix is planned in 3.11.1, 3.10.9, 3.9.16, 3.8.16, and 3.7.16.

  • Published: Nov 9, 2022
  • Updated: Nov 4, 2025
  • CVE: CVE-2022-45061
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWEs:

Software From Fixed in
python / python 3.11.0-alpha2 3.11.0-alpha2.x
python / python 3.11.0-alpha3 3.11.0-alpha3.x
python / python 3.11.0-alpha4 3.11.0-alpha4.x
python / python 3.11.0-alpha5 3.11.0-alpha5.x
python / python 3.11.0-alpha6 3.11.0-alpha6.x
python / python 3.11.0-alpha1 3.11.0-alpha1.x
python / python 3.11.0-beta2 3.11.0-beta2.x
python / python 3.11.0-beta3 3.11.0-beta3.x
python / python 3.11.0-beta4 3.11.0-beta4.x
python / python 3.11.0-beta5 3.11.0-beta5.x
python / python 3.11.0-rc1 3.11.0-rc1.x
python / python 3.11.0-alpha7 3.11.0-alpha7.x
python / python 3.11.0-beta1 3.11.0-beta1.x
python / python 3.11.0 3.11.0.x
python / python - 3.7.15.x
python / python 3.11.0-rc2 3.11.0-rc2.x
python / python 3.8.0 3.8.15.x
python / python 3.9.0 3.9.15.x
python / python 3.10.0 3.10.8.x
fedoraproject / fedora 36 36.x
fedoraproject / fedora 37 37.x
fedoraproject / fedora 35 35.x