MEDIUMCVSS v3.1 5.3Vulnerability
CVE-2026-126301
NLTK from 3.6 before 3.10.4 contains an algorithmic complexity vulnerability in LegalitySyllableTokenizer.tokenize that allows remote attackers to exhaust CPU by supplying long all-vowel tokens. Attackers can submit a token such as a long run of vowels, causing the unguarded onset reversal loop to perform quadratic work and deny service to syllabification components.
Properties
- Severity
- MEDIUM
- Nvd fetched at
- 2026-11-14T00:40:25.638091+00:00
- Epss score
- 0.00509
- Cvss severity
- MEDIUM
- Cvss score
- 5.3
- Retrieved at
- 2026-11-14T00:51:03+00:00
- Last source
- FIRST EPSS
- Score
- 5.3
- Cvss version
- 3.1
- Cve id
- CVE-2026-126301
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- First seen by Signal
- 2026-11-13T17:31:47+00:00
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Published at
- 2026-11-13T10:17:35.090
- Last modified
- 2026-11-13T10:17:35.220
- Epss percentile
- 0.44011
Related Entities (1)
HAS_WEAKNESS (1)
Related research
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