High severity · published Aug 22, 2026
CVE-2026-62385
NLTK 3.9.4 Path Traversal via FrameNet and NKJP Readers
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
NLTK versions before 3.10.0 contain a path traversal vulnerability in FramenetCorpusReader and NKJPCorpusReader that allows attackers to parse XML files outside the corpus root by supplying unsafe selectors or poisoned index state. Attackers can exploit frame_by_name, doc, lu, and header methods with crafted parameters to read arbitrary XML files accessible to the application.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NL
nltk · nltk
before 3.10.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-62385
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-62385
Exploit
https://github.com/nltk/nltk/security/advisories/GHSA-568f-pv23-39p4
Third Party Advisory
https://www.vulncheck.com/advisories/nltk-path-traversal-via-framenet-and-nkjp-readers
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