dnspython is a DNS toolkit for Python. Prior to 2.9.0, dns.name.from_wire_parser follows attacker-controlled DNS compression pointer chains without a hop limit. A malicious DNS wire-format message can force excessive pointer traversal during name decompression, causing high CPU use, application degradation, or denial of service in applications that process untrusted DNS messages. This issue is fixed in version 2.9.0.

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History

Thu, 22 Oct 2026 16:45:00 +0000

Type Values Removed Values Added
Description dnspython is a DNS toolkit for Python. Prior to 2.9.0, dns.name.from_wire_parser follows attacker-controlled DNS compression pointer chains without a hop limit. A malicious DNS wire-format message can force excessive pointer traversal during name decompression, causing high CPU use, application degradation, or denial of service in applications that process untrusted DNS messages. This issue is fixed in version 2.9.0.
Title dnspython dns.name.from_wire_parser() excessive CPU use
Weaknesses CWE-674
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-22T16:25:32.509Z

Reserved: 2026-10-21T20:34:25.599Z

Link: CVE-2026-114605

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-22T17:16:58.237

Modified: 2026-10-22T17:40:46.877

Link: CVE-2026-114605

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T17:45:09Z

Weaknesses