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CVE-2026-79675

Status: AnalyzedCritical (9.3)—

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

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Inferred by deterministic rules from the CVSS vector and CWE. Indicative only.

🛡️ ATT&CK mitigations that cover these techniques

Vulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkFilter Network TrafficApplication Isolation and Sandboxing

Affected technologies (1)

Nltk — Nltk

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-79675",
  "cveTags": [],
  "metrics": {
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          "options": [
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              "automatable": "yes"
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              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-08-26T03:56:24.719999Z"
        }
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    "cvssMetricV31": [
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          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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    "cvssMetricV40": [
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        "cvssData": {
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          "attackVector": "NETWORK",
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          "valueDensity": "NOT_DEFINED",
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          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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  "affected": [
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      "affectedData": [
        {
          "vendor": "nltk",
          "product": "nltk",
          "versions": [
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              "version": "0",
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              "version": "3.10.3",
              "versionType": "semver"
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          ],
          "packageURL": "pkg:pypi/nltk",
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  ],
  "published": "2026-08-25T16:17:28.013",
  "references": [
    {
      "url": "https://github.com/nltk/nltk/security/advisories/GHSA-m4rf-3fr8-xwx3",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "disclosure@vulncheck.com"
    },
    {
      "url": "https://www.vulncheck.com/advisories/nltk-before-jvm-argument-injection-via-per-call-options",
      "tags": [
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      "source": "disclosure@vulncheck.com"
    }
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
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          "value": "CWE-88"
        }
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    {
      "lang": "en",
      "value": "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."
    }
  ],
  "lastModified": "2026-09-01T20:08:49.830",
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          "negate": false,
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}