CVE-2026-81723
Low · 3.7CVSS
3.7
EPSS
0.3%
Published
Aug 27, 2026
CISA due date
—
The record
NLTK versions before 3.10.3 contain a quadratic CPU exhaustion vulnerability in XMLCorpusView._read_xml_fragment() that rescans accumulated XML fragments on every 1 KiB block read. Attackers can provide malformed XML corpus files to cause severe CPU consumption and denial of service through affected readers like BNCCorpusReader.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
Related vulnerabilities
- CVE-2026-113795 pypdf is a free and open-source pure-python PDF library. CWE-400
- CVE-2026-83400 Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise… CWE-400
- CVE-2026-112400 Pillow is a Python imaging library. CWE-400
- CVE-2026-111766 markdown-it is a Markdown parser. CWE-400
- CVE-2026-111759 markdown-it is a Markdown parser. CWE-400
- CVE-2025-52290 A NULL pointer dereference in the avpriv_h264_has_num_reorder_frames function of Ffmpeg… CWE-400
- CVE-2026-111066 AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. CWE-400
- CVE-2026-59951 The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context… CWE-400