CVE-2026-114605

dnspython dns.name.from_wire_parser() excessive CPU use

Published Oct 22, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4892-1 dnspython security update
Github GHSA Github GHSA GHSA-45c3-73f7-pv4m dnspython dns.name.from_wire_parser() excessive CPU use
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Rthalley
Rthalley dnspython
Weaknesses CWE-606
Vendors & Products Rthalley
Rthalley dnspython
References
Metrics threat_severity

None

threat_severity

Important

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Nov 12, 2026, 5:04 AM
Reserved
Oct 21, 2026, 8:34 PM
Status
Deferred
Published
Oct 22, 2026, 5:16 PM
Modified
Nov 12, 2026, 6:17 AM
Severity
Important
Public date
Oct 22, 2026, 4:25 PM