CVE-2026-114605
Published:October 22, 2026
Updated:October 23, 2026
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.
Affected Packages
dnspython (CONDA):
Affected version(s) >=2.0.0 <2.9.0Fix Suggestion:
Update to version 2.9.0https://github.com/rthalley/dnspython.git (GITHUB):
Affected version(s) >=v2.0.0rc1 <v2.9.0Fix Suggestion:
Update to version v2.9.0dnspython (PYTHON):
Affected version(s) >=2.0.0rc1 <2.9.0Fix Suggestion:
Update to version 2.9.0Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Uncontrolled Recursion