{"schemaVersion":3,"id":"CVE-2026-33231","aliases":["GHSA-jm6w-m3j8-898g","PYSEC-2026-2236","UBUNTU-CVE-2026-33231","DEBIAN-CVE-2026-33231","CGA-2v4r-99jp-v864","CGA-39h9-phqh-m4pg","CGA-4m24-648h-m3v7","CGA-54wh-r47f-pgpp","CGA-7pq9-g4qx-fw6x","CGA-7xh2-53qc-6v3p","CGA-876h-f5cq-4fxj","CGA-chh9-xr3q-85fh","CGA-j7x8-x6rr-c8q9","CGA-jj95-g337-59vp","CGA-m4p4-j99c-hpp7","CGA-p9wj-3jgp-5m2g","CGA-pj5g-f4v3-j78w","CGA-qpc8-gjv4-r7pc","CGA-w8q4-gjvx-j23x","CGA-wxrv-2jfh-qx46","CGA-xp4m-362f-73cx","CGA-434v-m2jm-9r55","CGA-9mp4-rwwf-vh3j","CGA-fm5w-hhfv-fm9r","CGA-g9qp-6m2x-427c","CGA-h2j7-2v63-7g57","CGA-pcm7-9675-2j86","CGA-r2w6-3867-g547","CGA-w69q-2xr7-39vp","CGA-x3qx-xrj5-4qjh"],"status":"published","duplicateOf":null,"title":null,"description":"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. 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