CVE-2026-114605: CWE-674: Uncontrolled Recursion in rthalley dnspython
Description
dnspython versions prior to 2.9.0 contain an uncontrolled recursion vulnerability in the dns.name.from_wire_parser function. This function follows DNS compression pointer chains without a hop limit, allowing a malicious DNS message to cause excessive pointer traversal. This can lead to high CPU usage, application degradation, or denial of service. The issue is fixed in dnspython version 2.9.0.
CVSS v3.1
Score 7.5high
Affected software
rthalley
dnspython
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The dnspython DNS toolkit for Python has a vulnerability (CWE-674) in versions before 2.9.0 where the dns.name.from_wire_parser function processes attacker-controlled DNS compression pointer chains without limiting recursion depth. This lack of a hop limit allows crafted DNS wire-format messages to trigger excessive pointer traversal during name decompression, resulting in high CPU consumption and potential denial of service in applications that handle untrusted DNS messages. The vulnerability is addressed in version 2.9.0.
Potential Impact
Exploitation of this vulnerability can cause high CPU usage and degrade application performance or cause denial of service in applications using vulnerable dnspython versions to process untrusted DNS messages. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Upgrade dnspython to version 2.9.0 or later, where this uncontrolled recursion vulnerability has been fixed. No other mitigation is indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-21T20:34:25.599Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ada3dcf4d27ba8daa67fdb6
Added to database: 10/22/2026, 16:46:07 UTC
Last enriched: 10/22/2026, 17:00:21 UTC
Last updated: 10/22/2026, 17:01:17 UTC
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.