CVE-2026-114605 dnspython dns.name.from_wire_parser() excessive CPU use
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-114605?
CVE-2026-114605 is a high-severity vulnerability in rthalley dnspython, published on 22 Oct 2026.
Official 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.
Weakness: CWE-674
Which versions are affected by CVE-2026-114605?
2 open source packages ship an affected version, including dnspython.
| Package | Affected | Fixed in |
|---|---|---|
dnspython PyPI | All versions | 2.9.0 |
dnspython PyPI | All versions | 2.9.0 |
How do I fix CVE-2026-114605?
Upgrade dnspython to 2.9.0 or later.
Is CVE-2026-114605 being exploited?
There is no known exploitation of CVE-2026-114605 in the wild and no public exploit code.
Sources
Also known as AZL-111002, DEBIAN-CVE-2026-114605, ECHO-204d-228d-37f9, GHSA-45c3-73f7-pv4m, MINI-cpr4-788r-vmqh, MINI-rxgj-627r-fgrf and 2 more.