HighFix available
python3 — security advisory
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.
- Products
- python3
- Affected versions
- Not specified
- Fixed versions
- 3.10.9-r0, 3.11.1-r0, 3.9.16-r0
- CVEs
- CVE-2022-45061
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 14:19 UTC · Revision 1
Source evidence
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.
osv:ALPINE-CVE-2022-45061
python3
Fixed versions: 3.9.16-r0
python3
Fixed versions: 3.9.16-r0
python3
Fixed versions: 3.10.9-r0
python3
Fixed versions: 3.10.9-r0
python3
Fixed versions: 3.11.1-r0
python3
Fixed versions: 3.11.1-r0
python3
Fixed versions: 3.11.1-r0
python3
Fixed versions: 3.11.1-r0
python3
Fixed versions: 3.11.1-r0
python3
Fixed versions: 3.11.1-r0
python3
Fixed versions: 3.11.1-r0
Complete source record
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"modified": "2026-10-15T07:17:54.274734584Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2022-45061"
]
},
"related_cves": [
{
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"evidence": "/upstream"
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],
"security_relevant": true,
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"source_id": "core-osv",
"document_id": 322051,
"published_at": "2022-11-09T07:15:09.887+00:00"
}