CVE-2026-114605
dnspython dns.name.from_wire_parser() excessive CPU use
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.
Fixes and workarounds
Fix
dnspython (PyPI): OSV reports a fixed version 2.9.0. Check the advisory for supported release branches.
Source: OSV GHSA-45c3-73f7-pv4mAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| dnspython rthalley |
< 2.9.0 (affected) | CNA: GitHub_M |
dnspythondnspython
PyPI |
1.0.0 (affected, PyPI) 1.1.0 (affected, PyPI) 1.10.0 (affected, PyPI) 1.11.0 (affected, PyPI) 1.11.1 (affected, PyPI) 1.12.0 (affected, PyPI) 1.13.0 (affected, PyPI) 1.14.0 (affected, PyPI) 1.15.0 (affected, PyPI) 1.16.0 (affected, PyPI) 1.2.0 (affected, PyPI) 1.3.0 (affected, PyPI) 1.3.1 (affected, PyPI) 1.3.2 (affected, PyPI) 1.3.3 (affected, PyPI) 1.3.4 (affected, PyPI) 1.3.5 (affected, PyPI) 1.4.0 (affected, PyPI) 1.5.0 (affected, PyPI) 1.6.0 (affected, PyPI) 1.7.1 (affected, PyPI) 1.8.0 (affected, PyPI) 1.9.0 (affected, PyPI) 1.9.1 (affected, PyPI) 1.9.2 (affected, PyPI) 1.9.3 (affected, PyPI) 1.9.4 (affected, PyPI) 2.0.0 (affected, PyPI) 2.0.0rc1 (affected, PyPI) 2.0.0rc2 (affected, PyPI) 2.1.0 (affected, PyPI) 2.1.0rc1 (affected, PyPI) 2.2.0 (affected, PyPI) 2.2.0rc1 (affected, PyPI) 2.2.1 (affected, PyPI) 2.3.0 (affected, PyPI) 2.3.0rc1 (affected, PyPI) 2.4.0 (affected, PyPI) 2.4.0rc1 (affected, PyPI) 2.4.1 (affected, PyPI) 2.4.2 (affected, PyPI) 2.5.0 (affected, PyPI) 2.5.0rc1 (affected, PyPI) 2.6.0 (affected, PyPI) 2.6.0rc1 (affected, PyPI) 2.6.1 (affected, PyPI) 2.7.0 (affected, PyPI) 2.7.0rc1 (affected, PyPI) 2.8.0 (affected, PyPI) 2.8.0rc1 (affected, PyPI) Ecosystem version events: introduced 0; fixed 2.9.0 Source events (ECOSYSTEM)Other versions: unaffected |
OSV GHSA-45c3-73f7-pv4m |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA: GitHub_M |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/rthalley/dnspython/security/advisories/GHSA-45c3-73f7-pv4mCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/rthalley/dnspython/commit/b485e460c266540a1a09ca6d8d1d7b685b1d3023CNA: GitHub_M · x_refsource_MISC
- https://github.com/rthalley/dnspython/releases/tag/v2.9.0CNA: GitHub_M · x_refsource_MISC
- https://lists.debian.org/debian-lts-announce/2026/11/msg00017.htmlADP: CVE
- https://github.com/advisories/GHSA-45c3-73f7-pv4mOSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-45c3-73f7-pv4mOSV / GitHub Security Advisories · osv
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