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This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. Prior to 3.10.0-rc1, nltk.data.load() in NLTK is vulnerable to path traversal via URL-encoded path separators and traversal segments when using the nltk: URL scheme. The unsafe-path regex check is performed before url2pathname() decodes the %xx sequences (a classic decode-after-check / TOCTOU-style flaw), allowing an attacker to bypass the protection documented in NLTK's SECURITY.md and read arbitrary files from the filesystem. While literal traversal strings such as ../../../etc/passwd are correctly blocked, encoded variants such as %2fetc%2fpasswd, %2e%2e%2f..., and ..%2f..%2f slip past the regex and are subsequently decoded into a real filesystem path. This vulnerability is fixed in 3.10.0-rc1.
Metrics
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[{"vendor":"Red Hat","product":"Exploit Intelligence","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"exploit-intelligence-tech-preview/vulnerability-analysis-rhel9","cpes":["cpe:/a:redhat:exploit_intelligence:0"]},{"vendor":"Red Hat","product":"OpenShift Lightspeed","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"openshift-lightspeed/lightspeed-ocp-rag-rhel9","cpes":["cpe:/a:redhat:openshift_lightspeed"]},{"vendor":"Red Hat","product":"OpenShift Lightspeed","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"openshift-lightspeed/lightspeed-service-api-rhel9","cpes":["cpe:/a:redhat:openshift_lightspeed"]},{"vendor":"Red Hat","product":"OpenShift Lightspeed","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"openshift-lightspeed-tech-preview/lightspeed-rag-tool-rhel9","cpes":["cpe:/a:redhat:openshift_lightspeed"]},{"vendor":"Red Hat","product":"Red Hat Ansible Automation Platform 2","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"ansible-automation-platform-25/lightspeed-chatbot-rhel8","cpes":["cpe:/a:redhat:ansible_automation_platform:2"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhoai/odh-llama-stack-core-rhel9","cpes":["cpe:/a:redhat:openshift_ai"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhoai/odh-pipeline-runtime-pytorch-llmcompressor-cuda-py312-rhel9","cpes":["cpe:/a:redhat:openshift_ai"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","defaultStatus":"affecte
CVE Modified by redhat-SADP7/14/2026 8:17:12 AM
Action
Type
Old Value
New Value
Changed
Affected
[{"vendor":"Red Hat","product":"Exploit Intelligence","defaultStatus":"affected","cpes":["cpe:/a:redhat:exploit_intelligence:0"]},{"vendor":"Red Hat","product":"OpenShift Lightspeed","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift_lightspeed"]},{"vendor":"Red Hat","product":"Red Hat Ansible Automation Platform 2","defaultStatus":"affected","cpes":["cpe:/a:redhat:ansible_automation_platform:2"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift_ai"]}]
[{"vendor":"Red Hat","product":"Exploit Intelligence","defaultStatus":"affected","cpes":["cpe:/a:redhat:exploit_intelligence:0"]},{"vendor":"Red Hat","product":"Red Hat Ansible Automation Platform 2","defaultStatus":"affected","cpes":["cpe:/a:redhat:ansible_automation_platform:2"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift_ai"]},{"vendor":"Red Hat","product":"OpenShift Lightspeed","defaultStatus":"unaffected","cpes":["cpe:/a:redhat:openshift_lightspeed"]}]
New CVE Received from GitHub, Inc.6/22/2026 3:17:20 PM
Action
Type
Old Value
New Value
Added
Description
NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. Prior to 3.10.0-rc1, nltk.data.load() in NLTK is vulnerable to path traversal via URL-encoded path separators and traversal segments when using the nltk: URL scheme. The unsafe-path regex check is performed before url2pathname() decodes the %xx sequences (a classic decode-after-check / TOCTOU-style flaw), allowing an attacker to bypass the protection documented in NLTK's SECURITY.md and read arbitrary files from the filesystem. While literal traversal strings such as ../../../etc/passwd are correctly blocked, encoded variants such as %2fetc%2fpasswd, %2e%2e%2f..., and ..%2f..%2f slip past the regex and are subsequently decoded into a real filesystem path. This vulnerability is fixed in 3.10.0-rc1.
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