CVE-2026-62383

nltk IPIPANCorpusReader Symlink Arbitrary File Read

MEDIUM
5.5
CVSS Score
Published: August 22, 2026 at 02:12 PM UTC
Updated: October 14, 2026 at 01:10 PM UTC
1 product affected across 1 vendorNltk

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

3.10.0 ≤ v < 3.10.23.10.0
Vendor states this is fixed in 3.10.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMVulnCheck
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-22

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