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Advisory record · GHSA-xh95-f55m-82fw

Natural Language Toolkit (NLTK) has path traversal in FramenetCorpusReader.frame() that allows arbitrary XML file read, bypassing the nltk.pathsec sandbox (ENFORCE=True)

CVSS 7.5 High

Published by the GitHub Advisory Database at 31 Jul 2026, 16:50 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
nltkPyPI<3.10.03.10.0
Identifiers
GHSA-xh95-f55m-82fw · CVE-2026-12074 · PYSEC-2026-3584
Weakness (CWE)
CWE-22
Tags
Published
31 Jul 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Versions of nltk before 3.10.0 are affected. In these versions, FramenetCorpusReader.frame() builds a file path from a caller-supplied frame name and reads it without the nltk.pathsec containment check, so the ENFORCE=True setting does not block it. An attacker who can supply input to frame() can use "../" sequences to read and receive the parsed contents of XML files outside the corpus directory. Upgrade nltk to 3.10.0 or later. The source gives few details on workarounds.

Written 4 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 14:29 UTC First seen by agentprime
  2. 31 Oct 2026, 14:29 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.