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TI-2026-55172 Aliases CVE-2026-79674GHSA-3gq4-3j92-5w49

NLTK 3.10.2 Path Traversal via corpus-reader constructors

Priority HIGH 77CWE-73Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · Low · None
Fix status
Partial Red Hat: 4 fixed, 5 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

NLTK versions before 3.10.3 contain a path sandbox bypass vulnerability in corpus-reader constructors that allows attackers to read files outside the intended data root. Attackers can supply arbitrary corpus root paths to LinThesaurusCorpusReader and PanLexLiteCorpusReader constructors to access filesystem content and SQLite databases outside the pathsec sandbox boundary.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00387 33rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial nltk (nltk): 3.10.3nltk (PyPI): 3.10.3Red Hat: 5 advisoriesRed Hat: 4 fixed, 5 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nltknltkbefore 3.10.33.10.3Patch availableCNA
—nltk (PyPI)before 3.10.33.10.3Patch availableGHSA-3gq4-3j92-5w49
  • nltk Vendornltk Affected before 3.10.3 Fixed in 3.10.3 Patch available CNA
  • nltk (PyPI) Vendor— Affected before 3.10.3 Fixed in 3.10.3 Patch available GHSA-3gq4-3j92-5w49

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:*before 3.10.3Vulnerablenltk
  • cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:* Versions before 3.10.3 Vulnerable ·nltk

Remediation

  • Fix · CNA nltk (nltk) Fixed in 3.10.3
  • Fix · GHSA-3gq4-3j92-5w49 nltk (PyPI) Fixed in 3.10.3 Advisory →

Red Hat 5 advisories

  • RHSA-2026:87410 Released 2026-10-21 · Red Hat rating Critical
    RHOAI 2.25.12 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 2.25 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-caikit-nlp-rhel9, registry.redhat.io/rhoai/odh-codeflare-operator-rhel9 +47
  • RHSA-2026:86891 Released 2026-10-21 · Red Hat rating Critical
    RHOAI 3.5.2 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 3.5 registry.redhat.io/rhoai/odh-automl-rhel9, registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-cli-rhel9 +47
  • RHSA-2026:84734 Released 2026-10-19 · Red Hat rating Critical
    RHOAI 3.4.5 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 3.4 registry.redhat.io/rhoai/odh-ai-gateway-payload-processing-rhel9, registry.redhat.io/rhoai/odh-automl-rhel9, registry.redhat.io/rhoai/odh-autorag-rhel9 +47
Show 2 more Red Hat advisories
  • RHSA-2026:73987 Released 2026-09-30 · Red Hat rating Critical
    RHOAI 3.3.7 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 3.3 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-dashboard-rhel9, registry.redhat.io/rhoai/odh-data-science-pipelines-argo-argoexec-rhel9 +47
  • RHSA-2026:69539 Released 2026-09-21 · Red Hat rating Important
    RHOAI 3.5.1 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 3.5 registry.redhat.io/rhoai/odh-cli-rhel9, registry.redhat.io/rhoai/odh-mlserver-cuda-rhel9, registry.redhat.io/rhoai/odh-mlserver-rhel9 +28

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    nltk 3.10.3

    7 records Highest priority Priority HIGH 6 HIGH, 1 MEDIUM

    Other records, highest priority first

    • TI-2026-55173 NLTK before 3.10.3 JVM Argument Injection via Per-Call OptionsPriority HIGH 81
    • TI-2026-55155 NLTK before 3.10.3 Remote Code Execution via Unsafe Pickle DeserializationPriority HIGH 81
    • TI-2026-54694 NLTK before 3.10.3 SSRF Protection Bypass via ProxyPriority HIGH 77
    Show all 7 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Exploit IntelligenceAffectedNo fix planned: Will not fix
Lightspeed CoreAffectedNo fix yet
OpenShift LightspeedAffectedNo fix yet
Red Hat Ansible Automation Platform 2AffectedNo fix planned: Will not fix
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet
Red Hat OpenShift AI 2.25Fixed RHSA-2026:87410
Red Hat OpenShift AI 3.3Fixed RHSA-2026:73987
Red Hat OpenShift AI 3.4Fixed RHSA-2026:84734
Red Hat OpenShift AI 3.5Fixed RHSA-2026:69539, RHSA-2026:86891
Not affected: 5 products
  • OpenShift Lightspeed
  • Red Hat OpenShift AI 2.25
  • Red Hat OpenShift AI 3.3
  • Red Hat OpenShift AI 3.4
  • Red Hat OpenShift AI 3.5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-79674
  2. 2026-10-03 Alias added: GHSA-3gq4-3j92-5w49
  3. 2026-10-07 Fix available: RHSA-2026:73987 · Red Hat
  4. 2026-10-20 Fix available: RHSA-2026:84734 · Red Hat
  5. 2026-10-20 Fix available: Red Hat OpenShift AI 3.4 · Red Hat
  6. 2026-10-22 Fix available: RHSA-2026:86891 · Red Hat
  7. 2026-10-22 Fix available: RHSA-2026:87410 · Red Hat
  8. 2026-10-23 Fix available: Red Hat OpenShift AI 2.25 · Red Hat

References

Exploit 1

Advisory 1

Other 4

  • TI-2026-00629 Arbitrary Code Execution in NLTK StanfordSegmenter via Untrusted JAR Loading CVSS 3.0CRITICAL 10.0
  • TI-2025-12800 Zip Slip Vulnerability in nltk/nltk Leading to Remote Code Execution CVSS 3.0CRITICAL 10.0
  • TI-2026-55173 NLTK before 3.10.3 JVM Argument Injection via Per-Call Options CVSS 4.0CRITICAL 9.3
  • TI-2026-55155 NLTK before 3.10.3 Remote Code Execution via Unsafe Pickle Deserialization CVSS 4.0CRITICAL 9.3
  • TI-2026-56370 nltk PorterStemmer before 3.10.3 Quadratic-time DoS CVSS 4.0HIGH 8.7
  • TI-2026-54694 NLTK before 3.10.3 SSRF Protection Bypass via Proxy CVSS 4.0HIGH 8.7
See all 41 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences