Answer in brief
CVE-2026-33236 records a High severity (CVSS 8.1) vulnerability in NLTK has a Downloader Path Traversal Vulnerability (AFO) - Arbitrary File Overwrite. The current sources do not mark it as known exploited. The current feed maps Red Hat/ansible-automation-platform-25/lightspeed-chatbot-rhel8 (generic), Red Hat/ansible-automation-platform-26/de-supported-rhel9 (generic), Red Hat/ansible-automation-platform-26/ee-supported-rhel9 (generic), Red Hat/lightspeed-core/lightspeed-stack-rhel9 (generic) and additional mapped packages. 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 8.1. 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 Red Hat/ansible-automation-platform-25/lightspeed-chatbot-rhel8 (generic), Red Hat/ansible-automation-platform-26/de-supported-rhel9 (generic), Red Hat/ansible-automation-platform-26/ee-supported-rhel9 (generic), Red Hat/lightspeed-core/lightspeed-stack-rhel9 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Red Hat/ansible-automation-platform-25/lightspeed-chatbot-rhel8generic | * | Not reported |
| Red Hat/ansible-automation-platform-26/de-supported-rhel9generic | * | Not reported |
| Red Hat/ansible-automation-platform-26/ee-supported-rhel9generic | * | Not reported |
| Red Hat/lightspeed-core/lightspeed-stack-rhel9generic | * | Not reported |
| Red Hat/lightspeed-core/rag-tool-rhel9generic | * | Not reported |
| nltk/nltkgeneric | <=3.9.3 | = 3.9.3 |
| Red Hat/openshift-lightspeed/lightspeed-ocp-rag-rhel9generic | * | Not reported |
| Red Hat/openshift-lightspeed/lightspeed-service-api-rhel9generic | * | Not reported |
| Red Hat/openshift-lightspeed-tech-preview/lightspeed-rag-tool-rhel9generic | * | Not reported |
| Red Hat/rhoai/odh-llama-stack-core-rhel9generic | * | Not reported |
| nltkpip | <3.9.4 | 3.9.4 |
Published upstream
Mar 20, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 10, 2026
NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. In versions 3.9.3 and prior, the NLTK downloader does not validate the `subdir` and `id` attributes when processing remote XML index files. Attackers can control a remote XML index server to provide malicious values containing path traversal sequences (such as `../`), which can lead to arbitrary directory creation, arbitrary file creation, and arbitrary file overwrite. Commit 89fe2ec2c6bae6e2e7a46dad65cc34231976ed8a patches the issue.
Quoted source text, attributed separately from HOL analysis.