CVE-2026-81726
highNLTK through 3.10.3 contains a path traversal vulnerability in model-artifact APIs that bypass pathsec enforcement by using raw file operations on caller-contr…
Vendor / product: Nltk — nltk
NLTK through 3.10.3 contains a path traversal vulnerability in model-artifact APIs that bypass pathsec enforcement by using raw file operations on caller-controlled paths. Attackers can read or write files outside allowed sandbox roots through TransitionParser, AveragedPerceptron, PerceptronTagger, and maxent parameter APIs when pathsec is enabled.
CVSS
7.0
7.0 (CVSS v3.1)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L Severity source: NVD CVSS v3.1 (disclosure@vulncheck.com)
Timeline (UTC)
Published: 2026-08-27 17:21
Modified: 2026-10-30 11:17
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-11-03 07:34 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
nltk / nltk <3.10.3
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://github.com/nltk/nltk/security/advisories/GHSA-8mgp-746c-j5xp
Vendor advisory: https://github.com/nltk/nltk/security/advisories/GHSA-8mgp-746c-j5xp
References
- https://github.com/nltk/nltk/security/advisories/GHSA-8mgp-746c-j5xp disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/nltk-through-3.10.3-path-traversal-via-model-artifact... disclosure@vulncheck.com
- https://github.com/nltk/nltk/security/advisories/GHSA-8mgp-746c-j5xp 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
NVD CVE API 2.0 — fetched 2026-11-03 07:34 UTC · record ↗