SEPTEMBER 19, 2026
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Case File

CVE-2026-63312

HIGH · CVSS 7.5 EPSS 0.56% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-22 · Last synced 2026-09-18

CyberRota Analysis

AI-Generated

NLTK versions prior to 3.10.0 are vulnerable to an arbitrary local file read issue in the StreamBackedCorpusView component, allowing attackers to bypass security measures and access sensitive files by manipulating the fileid argument. This vulnerability poses a significant risk as it can expose critical system files and application credentials. Organizations using NLTK should prioritize updating to version 3.10.0 or later to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-63312
Severity
HIGH
CVSS
7.5
EPSS
0.56%

Original NVD 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.

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