GitHub Advisoryadvisory · PyPI
GHSA-45c3-73f7-pv4m dnspython dns.name.from_wire_parser() excessive CPU use
HIGH
Official page ↗
- Aliases
- CVE-2026-114605
- Ecosystem
- PyPI
- Packages
- dnspython
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-674
- Reviewed
- 2026-10-27
Affected packages
• PyPI dnspython: < 2.9.0 → fixed in 2.9.0
Description
Impact
A maliciously crafted DNS message may cause dns.name.from_wire_parser() to use excessive CPU for DNS name decompression. Applications that process untrusted DNS wire form messages with dnspython may be degraded or DoS'd by the extra CPU use required.
Patches
This problem is fixed in dnspython 2.9.0.
Workarounds
There are no known workarounds.
Credit
Evgenios Gkritsis, Department of Informatics, University of Piraeus & Athena Research Center, Greece
Constantinos Patsakis, Department of Informatics, University of Piraeus & Athena Research Center, Greece
George Stergiopoulos, Department of Informatics, Athens University of Economics and Business, Greece
Related
Alias · CVE (1)
- CVE-2026-114605 dnspython is a DNS toolkit for Python. vulnerability
Weakness · CWE (1)
- CWE-674 Uncontrolled Recursion weakness
References
- https://github.com/rthalley/dnspython/security/advisories/GHSA-45c3-73f7-pv4m web
- https://nvd.nist.gov/vuln/detail/CVE-2026-114605 advisory
- https://github.com/rthalley/dnspython/commit/b485e460c266540a1a09ca6d8d1d7b685b1d3023 web
- https://github.com/rthalley/dnspython package
- https://github.com/rthalley/dnspython/releases/tag/v2.9.0 web