Vulnerability Database

328,409

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
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

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.