Medium 5.5Published Aug 22, 2026

CVE-2026-62383nltk IPIPANCorpusReader Symlink Arbitrary File Read

Updated under an hour ago (2026-10-19 06:50 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

nltk versions before 3.10.2 contain a symlink-based arbitrary file read vulnerability in IPIPANCorpusReader methods that bypass nltk.pathsec validation entirely. Attackers can place a symlink in the corpus root directory and read arbitrary files accessible to the process by calling channels(), domains(), categories(), or fileids() methods with the symlink filename.

CVSS: 5.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Aug 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nltk nltk nltk:nltk (from the name)	from 3.10.0 before 3.10.2; 3.10.2 not affected	CNA record
nltk nltk nltk:nltk	from 3.10.0 before 3.10.2	NVD

References

https://github.com/nltk/nltk/security/advisories/GHSA-3hhw-38pf-pxj6vendor-advisory, exploit, mitigation
https://www.vulncheck.com/advisories/nltk-ipipancorpusreader-symlink-arbitrary-file-readthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.