dnspython dns.name.from_wire_parser() excessive CPU use
GHSA-45c3-73f7-pv4m · CVE-2026-114605
Published · Modified
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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
References
- WEB https://github.com/rthalley/dnspython/security/advisories/GHSA-45c3-73f7-pv4m
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-114605
- WEB https://github.com/rthalley/dnspython/commit/b485e460c266540a1a09ca6d8d1d7b685b1d3023
- PACKAGE https://github.com/rthalley/dnspython
- WEB https://github.com/rthalley/dnspython/releases/tag/v2.9.0
- WEB https://lists.debian.org/debian-lts-announce/2026/11/msg00017.html
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