LOWCVSS 3.7Vulnerability
CVE-2026-81723
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.
Properties
- severity
- LOW
- summary
- NLTK: Quadratic CPU Exhaustion in `XMLCorpusView._read_xml_fragment()`
- epss_score
- 0.00281
- cvss_score
- 3.7
- cvss_severity
- LOW
- retrieved_at
- 2026-10-17T10:54:53+00:00
- ghsa_published
- 2026-09-02T14:34:11Z
- source_url
- https://github.com/advisories/GHSA-vp2x-qp44-57v7
- ghsa_updated
- 2026-09-02T14:34:12Z
- ghsa_id
- GHSA-vp2x-qp44-57v7
- score
- 3.7
- last_source
- FIRST EPSS
- cve_id
- CVE-2026-81723
- cvss_vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- signal_observed_at
- 2026-09-11T17:55:57+00:00
- is_ghsa_only
- false
- vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- published_at
- 2026-08-27T17:21:02.957
- last_modified
- 2026-09-24T20:44:42.207
- epss_percentile
- 0.19203
Related Entities (7)
DESCRIBED_BY (1)
→[Source]NVD
ENRICHED_BY (1)
→[Source]FIRST EPSS
REPORTED_BY (1)
→[Source]GitHub Advisory Database
VULNERABLE_TO (1)
←[Software]pip/nltk
AFFECTS (1)
→[Software]pip/nltk
HAS_WEAKNESS (2)
→[Weakness]Inefficient Algorithmic Complexity
→[Weakness]Uncontrolled Resource Consumption
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