rthalley/dnspython · Security
dnspython dns.name.from_wire_parser() excessive CPU use
- GHSA ID
- GHSA-45c3-73f7-pv4m
- CVE ID
- CVE-2026-114605
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v3
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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
CWEs
- CWE-674 · Uncontrolled Recursion
References
- https://github.com/rthalley/dnspython/security/advisories/GHSA-45c3-73f7-pv4m ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-114605 ↗
- https://github.com/rthalley/dnspython/commit/b485e460c266540a1a09ca6d8d1d7b685b1d3023 ↗
- https://github.com/rthalley/dnspython/releases/tag/v2.9.0 ↗
- https://github.com/advisories/GHSA-45c3-73f7-pv4m ↗