Is CVE-2026-54293 actively exploited?

No active exploitation of CVE-2026-54293 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-54293 be exploited remotely?

Yes. CVE-2026-54293 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-54293?

CVE-2026-54293 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-54293

CWE-22Published: June 22, 2026· Updated: Jun 26, 2026

7.5

CVSS v3.1

EPSS:0.44%probability of exploitation in 30 daysPercentile:34.9th

Official Description

NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. Prior to 3.10.0-rc1, nltk.data.load() in NLTK is vulnerable to path traversal via URL-encoded path separators and traversal segments when using the nltk: URL scheme. The unsafe-path regex check is performed before url2pathname() decodes the %xx sequences (a classic decode-after-check / TOCTOU-style flaw), allowing an attacker to bypass the protection documented in NLTK's SECURITY.md and read arbitrary files from the filesystem. While literal traversal strings such as ../../../etc/passwd are correctly blocked, encoded variants such as %2fetc%2fpasswd, %2e%2e%2f..., and ..%2f..%2f slip past the regex and are subsequently decoded into a real filesystem path. This vulnerability is fixed in 3.10.0-rc1.

NVD Source

Technical Analysis

CVE-2026-54293 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.