---
id: CVE-2026-59974
title: >-
  Stanza is a Stanford NLP Python library for tokenization, sentence
  segmentation, NER, and parsing of many human languages
summary: >-
  Stanza is a Stanford NLP Python library for tokenization, sentence
  segmentation, NER, and parsing of many human languages. Prior to 1.14.0,
  stanza.resources.common.unzip in stanza/resources/common.py passes downloaded
  model and resource …
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-22
vendor: stanfordnlp
product: stanza
affected:
  - stanza < 1.14.0
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T18:17:10.320'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59974'
references:
  - url: >-
      https://github.com/stanfordnlp/stanza/commit/a7085e75abdf35f277754dda472bba4e6819bcbb
    label: security-advisories@github.com
  - url: 'https://github.com/stanfordnlp/stanza/releases/tag/v1.14.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/stanfordnlp/stanza/security/advisories/GHSA-2fwf-f686-7p34
    label: security-advisories@github.com
  - url: >-
      https://github.com/stanfordnlp/stanza/security/advisories/GHSA-2fwf-f686-7p34
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-16T17:27:37.855901Z'
ingestedAt: '2026-09-16T16:59:56.613Z'
epss: 0.00405
epssPercentile: 0.32002
---

## Overview

Stanza is a Stanford NLP Python library for tokenization, sentence segmentation, NER, and parsing of many human languages. Prior to 1.14.0, stanza.resources.common.unzip in stanza/resources/common.py passes downloaded model and resource archives to zipfile.ZipFile.extractall without validating member paths, and the vulnerable extraction path is reachable through stanza.download and stanza.install_corenlp. A malicious archive containing parent-directory traversal entries can write outside the intended model directory, allowing files writable by the Stanza process to be overwritten and potentially enabling code execution through modified shell configuration, SSH authorization data, Python packages, or executable scripts. This issue is fixed in version 1.14.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.