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CVE-2026-59974

Stanza: Zip Slip Path Traversal in Model/Resource Extraction

HIGH
7.8
CVSS Score
Published: September 16, 2026 at 04:10 PM UTC
Updated: September 30, 2026 at 05:43 PM UTC
1 product affected across 1 vendorStanza

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Severity
HIGH7.8
Exploit prediction
EPSS 0.4%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Stanza· Stanfordnlp
60%
v < 1.14.0
Affected range stops below 1.14.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

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

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHGitHub_M
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-22

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