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CVE-2026-79674

Nltk path traversal

8.2 HIGHPublic exploitEPSS 0.39%
  1. Published25 Aug 2026

Description

NLTK versions before 3.10.3 contain a path sandbox bypass vulnerability in corpus-reader constructors that allows attackers to read files outside the intended data root. Attackers can supply arbitrary corpus root paths to LinThesaurusCorpusReader and PanLexLiteCorpusReader constructors to access filesystem content and SQLite databases outside the pathsec sandbox boundary.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Affected products

Nltk< 3.10.3

Remediation

Fixed in
Nltk≥ 3.10.3

References

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Frequently asked

Is CVE-2026-79674 being actively exploited?

CVE-2026-79674 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.39%.

How severe is CVE-2026-79674?

CVE-2026-79674 has a CVSS 3.1 base score of 8.2, rated high. EPSS estimates a 0.39% probability of exploitation.

Which products are affected by CVE-2026-79674?

Affected products include Nltk.

How do I fix CVE-2026-79674?

Upgrade affected software to a fixed version, for example Nltk 3.10.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.