Uncontrolled Recursion Affecting dnspython package, versions [,2.9.0)
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- published22 Oct 2026
- disclosed22 Oct 2026
- creditEvgenios Gkritsis, Constantinos Patsakis, George Stergiopoulos
Introduced: 22 Oct 2026
NewCVE-2026-114605 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade dnspython to version 2.9.0 or higher.
Overview
Affected versions of this package are vulnerable to Uncontrolled Recursion via dns.name.from_wire_parser() in dns/name.py, where a DNS message containing a long chain of compression pointers causes excessive CPU consumption during name decompression. An attacker can send a malicious DNS wire-format message to an application using dnspython, degrading or crashing the application through unbounded pointer chain traversal.