CVE-2026-63312
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Aug 22, 2026
Vendor
unknown
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.