8.3

GHSA-HQJ7-PHWP-C3FP: nltk PyPI

CVSS: 8.3v4.0HighPublished
Published 27-08-2026Last modified 02-09-2026
Open JSON

Vulnerability summary

GHSA-HQJ7-PHWP-C3FP is a high (CVSS 8.3) vulnerability in nltk PyPI.

Overall risk
33/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.3/10
010
High · v4.0 (OSV · Pypi), selected by version preference
EPSS score
Not scored
0%100%
No EPSS score yet
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
CVE-2026-81726

Timeline

  1. 27-08-2026
    PublishedVulnerability first disclosed.
  2. 02-09-2026
    Last modifiedVulnerability information updated.

Description

Duplicate Advisory: Model-artifact APIs bypass pathsec and touch files outside allowed roots ## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-8mgp-746c-j5xp. This link is maintained to preserve external references. ## Original Description NLTK through 3.10.3 contains a path traversal vulnerability in model-artifact APIs that bypass pathsec enforcement by using raw file operations on caller-controlled paths. Attackers can read or write files outside allowed sandbox roots through TransitionParser, AveragedPerceptron, PerceptronTagger, and maxent parameter APIs when pathsec is enabled.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

No EPSS score has been published for this record yet.

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

PyPI1 product
  • nltk≤ 3.10.3

1 vendor · 1 product

References

3 links