Critical severity · published Aug 25, 2026
CVE-2026-79675
NLTK before 3.10.3 JVM Argument Injection via Per-Call Options
9.8
CVSS
0.8%
EPSS
No
On KEV
Description
NLTK before 3.10.3 fails to validate JVM options passed through the per-call options parameter in the java() function, allowing attackers to inject dangerous JVM flags. Attackers can supply malicious options like -agentpath, -javaagent, or @argfile to Stanford wrapper classes to achieve arbitrary code execution.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NL
nltk · nltk
before 3.10.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-79675
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-79675
Exploit
https://github.com/nltk/nltk/security/advisories/GHSA-m4rf-3fr8-xwx3
Third Party Advisory
https://www.vulncheck.com/advisories/nltk-before-jvm-argument-injection-via-per-call-options
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