Vulnerability details
CVE-2026-33236
Red Hat Lightspeed CoreRed Hat OpenShift LightspeedRed Hat Ansible Automation Platform 2Red Hat OpenShift AInltk nltk
NLTK has a Downloader Path Traversal Vulnerability (AFO) - Arbitrary File Overwrite
CVSS 3.1
8.1High
Official 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. 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.1High | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H |
| 8.1High | 3.1 | CVEProject cvelistV5 (CNA) (redhat-SADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Red Hat | Lightspeed Core | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Lightspeed Core | All | CVEProject cvelistV5 (CNA) |
| Red Hat | OpenShift Lightspeed | All | CVEProject cvelistV5 (CNA) |
| Red Hat | OpenShift Lightspeed | All | CVEProject cvelistV5 (CNA) |
| Red Hat | OpenShift Lightspeed | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat Ansible Automation Platform 2 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat Ansible Automation Platform 2 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat Ansible Automation Platform 2 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat OpenShift AI (RHOAI) | All | CVEProject cvelistV5 (CNA) |
| nltk | nltk | <= 3.9.3 | CVEProject cvelistV5 (CNA) |
References and advisories
9- https://github.com/nltk/nltk/security/advisories/GHSA-469j-vmhf-r6v7 x_refsource_CONFIRM
- https://github.com/nltk/nltk/commit/89fe2ec2c6bae6e2e7a46dad65cc34231976ed8a x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2026-33236 vdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2449824 issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33236.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:10184 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:42644 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:19712 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:37275 vendor-advisoryx_refsource_REDHAT
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Details
- Published
- 2026-03-21
- Last updated
- 2026-07-21
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.61%
Probability of exploitation in 30 days
49.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')