VDB
CVE-2026-33231
CVE-2026-33231
PUBLISHED
CVSS 7.5 HIGH
NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. In versions 3.9.3 and prior, `nltk.app.wordnet_app` allows unauthenticated remote shutdown of the local WordNet Browser HTTP server when it is started in its default mode. A simple `GET /SHUTDOWN%20THE%20SERVER` request causes the process to terminate immediately via `os._exit(0)`, resulting in a denial of service. Commit bbaae83db86a0f49e00f5b0db44a7254c268de9b patches the issue.
EPSS 0.02% · 5.8th percentile
Risk Scores
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.02%
5.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| PyPI | nltk | 0, 0, 0 |
| nltk | nltk | 0, <= 3.9.3, 0 |
Timeline
- Mar 19, 2026 CVE Published
- Mar 20, 2026 Security Advisory
- Mar 20, 2026 PoC Published
- Mar 20, 2026 PoC Published
- Mar 21, 2026 EPSS Score
- Mar 22, 2026 EPSS Score
- Mar 22, 2026 Coalition ESS Score
- Mar 23, 2026 EPSS Score
- Mar 24, 2026 EPSS Score
- Mar 24, 2026 PoC Published
- Mar 25, 2026 EPSS Score
- May 18, 2026 EPSS Score
References
- https://github.com/nltk/nltk/security/advisories/GHSA-jm6w-m3j8-898g url
- https://github.com/nltk/nltk/commit/bbaae83db86a0f49e00f5b0db44a7254c268de9b url
- https://nvd.nist.gov/vuln/detail/CVE-2026-33231 advisory
- https://github.com/nltk/nltk package
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37451 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37445 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37460 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37449 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37450 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37466 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37468 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37444 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37461 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37459 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37446 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37465 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37448 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37447 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37463 advisory
- https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/37452 advisory
…and 2 more