CVE-2026-79675High· 8.1▾ TwilightA flaw was found in NLTK. When processing untrusted input for its `per-call options` parameter in the `java()` function, NLTK fails to validate Java Virtual Machine (JVM) options. A remote attacker could exploit this by injecting dangerous…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 44.6 · likelihood 0.2 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Sep 1.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.4%
8.1 → 9.8
high → critical
9.8 → 8.1
critical → high
8.1 → 9.8
high → critical
9.8 → 8.1
critical → high
8.1 → 9.8
high → critical
9.8 → 8.1
critical → high
0.4% → 0.8%
Last analysed / modified upstream
A flaw was found in NLTK. When processing untrusted input for its per-call options parameter in the java() function, NLTK fails to validate Java Virtual Machine (JVM) options. A remote attacker could exploit this by injecting dangerous JVM flags, such as -agentpath or -javaagent, to achieve arbitrary code execution. Successful exploitation requires specific conditions, indicating a higher attack complexity.
nltk: NLTK before 3.10.3 JVM Argument Injection via Per-Call Options — rated Important by Red Hat. Released 2026-08-25, updated 2026-10-19.
Affected:
Fixed:
No fix planned:
Not affected:
For Red Hat OpenShift AI 3.3.7 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update:
https://docs.redhat.com/en/documentation/red_hat_openshift_ai/ https://access.redhat.com/errata/RHSA-2026:73987 For Red Hat OpenShift AI 3.4.5 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update:
https://docs.redhat.com/en/documentation/red_hat_openshift_ai/ https://access.redhat.com/errata/RHSA-2026:84734
Workarounds / mitigations:
Affected packages:
nltk < 3.10.3Patched in:
nltk 3.10.3Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-81725Medium· 5.9nltk: NLTK: Regular Expression Denial of Service via malformed TEI blocks (CVE-2026-81725)
CVE-2026-80205High· 7.5nltk: NLTK: Denial of Service via unvalidated regular expressions (CVE-2026-80205)
CVE-2026-79674High· 7.5nltk: NLTK: Information disclosure via path traversal in corpus-reader constructors (CVE-2026-79674)
CVE-2026-81724High· 7.5nltk: NLTK: Denial of Service via Uncontrolled Recursion (CVE-2026-81724)
CVE-2026-81727High· 7.1nltk: NLTK: Filesystem containment bypass allows local file overwrite (CVE-2026-81727)
CVE-2026-81722High· 7.5nltk: nltk PorterStemmer: Denial of Service due to inefficient token processing (CVE-2026-81722)