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Vulnerability record · CVE-2026-59974 · published 16 September 2026

CVE-2026-59974: Path traversal vulnerability

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.

7.8 CVSS 3.1 High EPSS 0.40% · top 67.9% CWE-22 · Path traversal Received
7.8CVSS 3.1 base score
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
16 Sep 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/stanfordnlp/stanza/commit/a7085e75abdf35f277754dda472bba4e6819bcbb
https://github.com/stanfordnlp/stanza/releases/tag/v1.14.0
https://github.com/stanfordnlp/stanza/security/advisories/GHSA-2fwf-f686-7p34
https://github.com/stanfordnlp/stanza/security/advisories/GHSA-2fwf-f686-7p34

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Source: NIST National Vulnerability Database (record CVE-2026-59974), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.