CVE-2026-79676

NLTK before 3.10.3 Path Traversal via Symlink Bypass

MEDIUM
5.9
CVSS Score
Published: August 25, 2026 at 03:16 PM UTC
Updated: August 31, 2026 at 07:16 PM UTC
1 product affected across 1 vendorNltk

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Severity
MEDIUM5.9
Exploit prediction
EPSS 0.4%
SSVC
PoC

Description

NLTK versions before 3.10.3 contain a path traversal vulnerability in corpus readers that reopen root-derived paths using built-in open() instead of nltk.pathsec.open(), allowing symlinks to escape trusted roots. Attackers who stage symlinked corpus files under a trusted data root can disclose outside-root content through normal corpus reader methods like channels(), domains(), and synonyms().

Affected

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

v < 3.10.3
Vendor states this is fixed in 3.10.3 (unaffected)

Remediation

No guide yet

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

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

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

CVSS

5.9MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-22

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