high7.5
CVE-2026-62388
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.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | nltk | <= 3.9.4 | 3.10.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Nltk | Nltk | before 3.10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-p3m8-78j2-g5p3
- https://github.com/nltk/nltk/security/advisories/GHSA-p3m8-78j2-g5p3
- https://nvd.nist.gov/vuln/detail/CVE-2026-62388
- https://github.com/nltk/nltk/pull/3593
- https://github.com/nltk/nltk/commit/155e40343cff0bf50d233e274a12e04d1428b1d9
- https://github.com/nltk/nltk/releases/tag/v3.10.0
- https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2026-3722.yaml
- https://www.vulncheck.com/advisories/nltk-before-insecure-default-configuration-pathsec