OSV security advisoryHigh
High advisory for python-dns
OESA-2026-4674 · Reported 4 Nov 2026
Full advisory details, affected packages, severity context, and original source.
Affected technology
python-dnsPython ecosystem
Advisory overview
\ Security Fix(es): 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.(CVE-2026-114605)
Affected packages and releases
openEuler:24.03-LTS-SP3 / python-dns
introduced: 0 · fixed: 2.4.2-5.oe2403sp3