CVE-2026-12243
2 advisories.
PyPI/nltk CVE-2026-12243: high 7.5
nltk: Arbitrary File Read via Path Traversal in nltk.data.load() through Percent-Encoded Sequences
Action: Upgrade nltk to 3.10.0 or later.
pip install nltk==3.10.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 3.10.0 | - |
Fixed versions
| 3.10.0 |
Sources
- osv: GHSA-m42h-3232-vpv3
- https://github.com/nltk/nltk/security/advisories/GHSA-m42h-3232-vpv3
- https://nvd.nist.gov/vuln/detail/CVE-2026-12243
- https://github.com/nltk/nltk/issues/3504
- https://github.com/nltk/nltk/pull/3522
- https://github.com/nltk/nltk/commit/aec4fce1b84ad725b8975f7365b23a4f626572a9
- https://github.com/nltk/nltk
- https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2026-597.yaml
- https://huntr.com/bounties/39aa9354-54ca-4e77-96da-580eb1fe6ed1
- https://securityinfinity.com/research/path-traversal-in-nltks-nltk-data-load-via-percent-encoded-sequences
CVE-2026-12243 · published · modified · JSON
PyPI/nltk CVE-2026-12243: high 7.5
NLTK version 3.9.4 is vulnerable to a path traversal attack due to an incomplete fix for GitHub Issue #3504. The `_UNSAFE_NO_PROTOCOL_RE` regex in `nltk/data.py` checks for literal `../` sequences but
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | 3.9.4 |
Fixed versions
No fixed version in the source.
Sources
- osv: PYSEC-2026-597
- https://huntr.com/bounties/39aa9354-54ca-4e77-96da-580eb1fe6ed1
- https://github.com/advisories/GHSA-m42h-3232-vpv3
CVE-2026-12243 · published · modified · JSON