CVE-2026-114605
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductDnspython
PublishedOct 22, 2026
First seenOct 22, 2026
Weakness typeCWE-674CWE-674
How to fix
Update
- dnspython2.9.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| dnspythonPyPI | v < 2.9.0 | 2.9.0 |
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