CVE-2026-62384

NLTK FramenetCorpusReader Symlink Sandbox Bypass before 3.10.2

HIGH
7.5
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
HIGH7.5
Exploit prediction
EPSS 0.7%
SSVC
PoC

Description

NLTK versions before 3.10.2 contain a symlink-based sandbox bypass in FramenetCorpusReader that allows attackers to read arbitrary XML files outside the corpus root. Attackers can place symlinks with names containing no path separators inside the corpus subdirectory, which pass the path validation guard and are resolved to files outside the intended corpus root when accessed via frame_by_name(), _lu_file(), or doc() methods.

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

SSVCPoCAutomatablePartial impact

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

CVSS

7.5HIGHVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-22

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