Answer in brief
CVE-2026-128089 records a High severity (CVSS 7.5) vulnerability in dnspython excessive memory and CPU use. The current sources do not mark it as known exploited. The current feed maps rthalley/dnspython (generic), dnspython (pip), dnspython (pypi). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
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.
The current feed maps rthalley/dnspython (generic), dnspython (pip), dnspython (pypi). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| rthalley/dnspythongeneric | <2.9.2 | 2.9.2 |
| dnspythonpip | <2.9.2 | 2.9.2 |
| dnspythonpypi | >=0 <2.9.2 | 2.9.2 |
Published upstream
Nov 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 13, 2026
dnspython is a DNS toolkit for Python. Prior to version 2.9.2, the from_text() parser for WKS records does not require the service number to be between 0 and 65535 before using it as a bitmap offset. An attacker-controlled zone file can supply a larger number, causing the service bitmap to grow to an extremely large size through inefficient repeated extension, consuming excessive memory and CPU and potentially terminating the process. Applications are affected only when they parse zone-file text whose record type and rdata are attacker controlled. This issue is fixed in version 2.9.2.
Quoted source text, attributed separately from HOL analysis.