Description
NLTK before 3.10.0 contains an arbitrary local file read vulnerability in StreamBackedCorpusView that bypasses pathsec.ENFORCE by calling builtins.open() directly instead of pathsec.open(). Attackers who control the fileid argument can read arbitrary local files regardless of the ENFORCE setting, including sensitive system files and application credentials.
Published: 2026-08-22
Score: 8.7 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 22 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Description NLTK before 3.10.0 contains an arbitrary local file read vulnerability in StreamBackedCorpusView that bypasses pathsec.ENFORCE by calling builtins.open() directly instead of pathsec.open(). Attackers who control the fileid argument can read arbitrary local files regardless of the ENFORCE setting, including sensitive system files and application credentials.
Title NLTK StreamBackedCorpusView Bypasses pathsec.ENFORCE Arbitrary File Read
First Time appeared Nltk
Nltk nltk
Weaknesses CWE-22
CPEs cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:*
Vendors & Products Nltk
Nltk nltk
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

Nltk Nltk
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-22T14:12:40.731Z

Reserved: 2026-07-16T12:13:18.733Z

Link: CVE-2026-63312

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-22T15:16:19.367

Modified: 2026-08-22T15:16:19.367

Link: CVE-2026-63312

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-22T15:30:05Z

Weaknesses