{"metadata": {"vulnerability": "CVE-2021-43854", "count": 29, "kinds": {"milestone": 9, "sighting": 2, "kev": 0, "other": 18}}, "data": [{"timestamp": "2021-11-16T00:00:00Z", "date_only": false, "value": "2021-11-16T00:00:00.000Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "CVE-2021-43854", "field": "cveMetadata.dateReserved"}, {"timestamp": "2021-12-23T00:00:00Z", "date_only": true, "value": "2021-12-23", "kind": "other", "label": "Pubdate", "source": "gsd \u00b7 GSD-2021-43854", "record": "GSD-2021-43854", "field": "namespaces.gitlab.com.advisories.0.pubdate"}, {"timestamp": "2021-12-23T17:55:11Z", "date_only": false, "value": "2021-12-23T17:55:11.000Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2021-43854", "field": "cveMetadata.datePublished"}, {"timestamp": "2021-12-23T17:55:11Z", "date_only": false, "value": "2021-12-23T17:55:11.000Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / GitHub_M", "record": "CVE-2021-43854", "field": "containers.cna.providerMetadata.dateUpdated"}, {"timestamp": "2021-12-23T18:15:00Z", "date_only": false, "value": "2021-12-23T18:15:00Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-F8M6-H2C7-8H9X", "record": "GHSA-F8M6-H2C7-8H9X", "field": "database_specific.nvd_published_at"}, {"timestamp": "2021-12-23T18:15:00Z", "date_only": false, "value": "2021-12-23T18:15:00Z", "kind": "milestone", "label": "Published", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2021-43854", "record": "UBUNTU-CVE-2021-43854", "field": "published"}, {"timestamp": "2021-12-23T18:15:00Z", "date_only": false, "value": "2021-12-23T18:15:00Z", "kind": "milestone", "label": "Published", "source": "pysec \u00b7 PYSEC-2021-859", "record": "PYSEC-2021-859", "field": "published"}, {"timestamp": "2021-12-23T18:15:00Z", "date_only": false, "value": "2021-12-23T18:15Z", "kind": "other", "label": "Published Date", "source": "gsd \u00b7 GSD-2021-43854", "record": "GSD-2021-43854", "field": "namespaces.nvd.nist.gov.publishedDate"}, {"timestamp": "2021-12-23T18:15:07.327Z", "date_only": false, "value": "2021-12-23T18:15:07.327", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2021-43854", "record": "FKIE_CVE-2021-43854", "field": "published"}, {"timestamp": "2021-12-23T20:21:12Z", "date_only": false, "value": "2021-12-23T20:21:12.000000Z", "kind": "sighting", "label": "Seen", "source": "https://t.me/cibsecurity/34573", "record": "CVE-2021-43854", "field": "creation_timestamp", "uuid": "7955d96e-576e-4f50-98f5-42ff1d802dac", "content": "\u203c CVE-2021-43854 \u203c\n\nNLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. Versions prior to 3.6.5 are vulnerable to regular expression denial of service (ReDoS) attacks. The vulnerability is present in PunktSentenceTokenizer, sent_tokenize and word_tokenize. Any users of this class, or these two functions, are vulnerable to the ReDoS attack. In short, a specifically crafted long input to any of these vulnerable functions will cause them to take a significant amount of execution time. If your program relies on any of the vulnerable functions for tokenizing unpredictable user input, then we would strongly recommend upgrading to a version of NLTK without the vulnerability. For users unable to upgrade the execution time can be bounded by limiting the maximum length of an input to any of the vulnerable functions. Our recommendation is to implement such a limit.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "url": "https://t.me/cibsecurity/34573"}, {"timestamp": "2021-12-27T00:00:00Z", "date_only": true, "value": "2021-12-27", "kind": "other", "label": "Submit Time", "source": "cnvd \u00b7 CNVD-2022-00605", "record": "CNVD-2022-00605", "field": "submitTime"}, {"timestamp": "2022-01-04T00:00:00Z", "date_only": true, "value": "2022-01-04", "kind": "other", "label": "Date", "source": "gsd \u00b7 GSD-2021-43854", "record": "GSD-2021-43854", "field": "namespaces.gitlab.com.advisories.0.date"}, {"timestamp": "2022-01-04T16:38:00Z", "date_only": false, "value": "2022-01-04T16:38Z", "kind": "other", "label": "Last Modified Date", "source": "gsd \u00b7 GSD-2021-43854", "record": "GSD-2021-43854", "field": "namespaces.nvd.nist.gov.lastModifiedDate"}, {"timestamp": "2022-01-04T17:38:55.854Z", "date_only": false, "value": "2022-01-04T17:38:55.854845Z", "kind": "other", "label": "Updated", "source": "pysec \u00b7 PYSEC-2021-859", "record": "PYSEC-2021-859", "field": "modified"}, {"timestamp": "2022-01-05T00:00:00Z", "date_only": true, "value": "2022-01-05", "kind": "other", "label": "Open Time", "source": "cnvd \u00b7 CNVD-2022-00605", "record": "CNVD-2022-00605", "field": "openTime"}, {"timestamp": "2022-01-06T17:38:45Z", "date_only": false, "value": "2022-01-06T17:38:45Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-F8M6-H2C7-8H9X", "record": "GHSA-F8M6-H2C7-8H9X", "field": "published"}, {"timestamp": "2023-12-13T01:23:26.418Z", "date_only": false, "value": "2023-12-13T01:23:26.418147Z", "kind": "other", "label": "Updated", "source": "gsd \u00b7 GSD-2021-43854", "record": "GSD-2021-43854", "field": "gsd.osvSchema.modified"}, {"timestamp": "2024-08-04T04:10:16.281Z", "date_only": false, "value": "2024-08-04T04:10:16.281Z", "kind": "other", "label": "Updated", "source": "cvelistv5", "record": "CVE-2021-43854", "field": "cveMetadata.dateUpdated"}, {"timestamp": "2024-08-04T04:10:16.281Z", "date_only": false, "value": "2024-08-04T04:10:16.281Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / CVE", "record": "CVE-2021-43854", "field": "containers.adp.0.providerMetadata.dateUpdated"}, {"timestamp": "2024-09-26T14:17:15Z", "date_only": false, "value": "2024-09-26T14:17:15Z", "kind": "other", "label": "Updated", "source": "github \u00b7 GHSA-F8M6-H2C7-8H9X", "record": "GHSA-F8M6-H2C7-8H9X", "field": "modified"}, {"timestamp": "2025-03-24T06:00:07.692Z", "date_only": false, "value": "2025-03-24T06:00:07.692161Z", "kind": "sighting", "label": "Seen", "source": "https://bsky.app/profile/clayton256.bsky.social/post/3ll43cikdp625", "record": "CVE-2021-43854", "field": "creation_timestamp", "uuid": "853fe9be-5218-4ffd-ab0a-9a8f701c0ba8", "url": "https://bsky.app/profile/clayton256.bsky.social/post/3ll43cikdp625"}, {"timestamp": "2025-07-18T16:47:03Z", "date_only": false, "value": "2025-07-18T16:47:03Z", "kind": "other", "label": "Updated", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2021-43854", "record": "UBUNTU-CVE-2021-43854", "field": "modified"}, {"timestamp": "2026-06-17T04:11:34.653Z", "date_only": false, "value": "2026-06-17T04:11:34.653", "kind": "other", "label": "Updated", "source": "fkie_nvd \u00b7 FKIE_CVE-2021-43854", "record": "FKIE_CVE-2021-43854", "field": "lastModified"}, {"timestamp": "2026-08-13T16:34:58Z", "date_only": false, "value": "2026-08-13T16:34:58Z", "kind": "milestone", "label": "Published", "source": "osv_homebrew \u00b7 BREW-ACRONYM-CVE-2021-43854", "record": "BREW-ACRONYM-CVE-2021-43854", "field": "published"}, {"timestamp": "2026-08-13T16:54:46Z", "date_only": false, "value": "2026-08-13T16:54:46Z", "kind": "milestone", "label": "Published", "source": "osv_homebrew \u00b7 BREW-GPTLINE-CVE-2021-43854", "record": "BREW-GPTLINE-CVE-2021-43854", "field": "published"}, {"timestamp": "2026-08-13T17:33:32Z", "date_only": false, "value": "2026-08-13T17:33:32Z", "kind": "milestone", "label": "Published", "source": "osv_homebrew \u00b7 BREW-SAFETY-CVE-2021-43854", "record": "BREW-SAFETY-CVE-2021-43854", "field": "published"}, {"timestamp": "2026-09-09T23:40:40Z", "date_only": false, "value": "2026-09-09T23:40:40Z", "kind": "other", "label": "Updated", "source": "osv_homebrew \u00b7 BREW-ACRONYM-CVE-2021-43854", "record": "BREW-ACRONYM-CVE-2021-43854", "field": "modified"}, {"timestamp": "2026-09-10T00:05:56Z", "date_only": false, "value": "2026-09-10T00:05:56Z", "kind": "other", "label": "Updated", "source": "osv_homebrew \u00b7 BREW-GPTLINE-CVE-2021-43854", "record": "BREW-GPTLINE-CVE-2021-43854", "field": "modified"}, {"timestamp": "2026-09-10T01:10:54Z", "date_only": false, "value": "2026-09-10T01:10:54Z", "kind": "other", "label": "Updated", "source": "osv_homebrew \u00b7 BREW-SAFETY-CVE-2021-43854", "record": "BREW-SAFETY-CVE-2021-43854", "field": "modified"}]}