High · CVSS 7.5CVE-2026-114605

dnspython dns.name.from_wire_parser() excessive CPU useCVE-2026-114605

Answer in brief

CVE-2026-114605 records a High severity (CVSS 7.5) vulnerability in dnspython dns.name.from_wire_parser() excessive CPU use. The current sources do not mark it as known exploited. The current feed maps rthalley/dnspython (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 22, 2026Updated Oct 22, 2026Source checked Oct 22, 2026First seen by HOL Oct 22, 2026Material review Oct 22, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps rthalley/dnspython (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
rthalley/dnspythongeneric	<2.9.0	2.9.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for rthalley/dnspython.
Review the reported fix. Update rthalley/dnspython to 2.9.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 22, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 22, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Authenticated Denial-of-Service in Zigbee Publish Billing PeriodAlso CWE-674