High severity7.5NVD Advisory· Published Aug 22, 2026· Updated Aug 27, 2026
CVE-2026-62388
CVE-2026-62388
Description
NLTK versions before 3.10.0 default to ENFORCE=False in pathsec.py, causing all security validation functions to emit warnings instead of raising exceptions. Attackers can bypass path traversal and pickle deserialization protections by exploiting the disabled security controls that are only active when manually enabled.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
nltkPyPI | < 3.10.0 | 3.10.0 |
Affected products
2Patches
Vulnerability mechanics
References
8- github.com/nltk/nltk/security/advisories/GHSA-p3m8-78j2-g5p3nvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-p3m8-78j2-g5p3ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-62388ghsaADVISORY
- www.vulncheck.com/advisories/nltk-before-insecure-default-configuration-pathsecnvdThird Party AdvisoryWEB
- github.com/nltk/nltk/commit/155e40343cff0bf50d233e274a12e04d1428b1d9ghsaWEB
- github.com/nltk/nltk/pull/3593ghsaWEB
- github.com/nltk/nltk/releases/tag/v3.10.0ghsaWEB
- github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2026-3722.yamlghsaWEB
News mentions
1- NLTK: Thirteen Path Traversal, RCE, and DoS Vulnerabilities Disclosed TogetherVypr Intelligence · Aug 22, 2026