CVE-2026-0847Path Traversal in nltk/nltk
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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A vulnerability in NLTK versions up to and including 3.9.2 allows arbitrary file read via path traversal in multiple CorpusReader classes, including WordListCorpusReader, TaggedCorpusReader, and BracketParseCorpusReader. These classes fail to properly sanitize or validate file paths, enabling attackers to traverse directories and access sensitive files on the server. This issue is particularly critical in scenarios where user-controlled file inputs are processed, such as in machine learning APIs, chatbots, or NLP pipelines. Exploitation of this vulnerability can lead to unauthorized access to sensitive files, including system files, SSH private keys, and API tokens, and may potentially escalate to remote code execution when combined with other vulnerabilities.
- CVSS
- 8.6 HIGH (v3.0, CNA)CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
- Weakness (CWE)
- CWE-22
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- @huntr_ai
- NVD analysis
- Modified
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
nltk nltk/nltk nltk:nltk (from the name) | from unspecified through latest | CNA record |
Red Hat Red Hat OpenShift AI 2.25 redhat:openshift_ai | from 1775144403 not affected | CISA ADP |
Red Hat Lightspeed Core redhat:lightspeed_core | All versions | CISA ADP |
Red Hat OpenShift Lightspeed redhat:openshift_lightspeed | Versions not stated | CISA ADP |
Red Hat Red Hat Ansible Automation Platform 2 redhat:ansible_automation_platform | 2 | CISA ADP |
nltk nltk nltk:nltk | through 3.9.2 | NVD |
References
- https://huntr.com/bounties/fc69914f-36a9-4c18-8503-10013b39f966exploit, vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:10184
- https://access.redhat.com/errata/RHSA-2026:19712
- https://access.redhat.com/security/cve/CVE-2026-0847
- https://bugzilla.redhat.com/show_bug.cgi?id=2444608
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0847.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.