{"answers":{"affected":"3 open source packages ship an affected version, including nltk.","exploited":"There is no known exploitation of CVE-2026-12243 in the wild and no public exploit code.","fix":"Upgrade nltk to 3.10.0 or later.","what":"CVE-2026-12243 is a vulnerability in nltk, published on 30 Jun 2026."},"fix_prompt":"Check this codebase for CVE-2026-12243 and fix it if it is affected.\n\nWhat it is: CVE-2026-12243 is a vulnerability in nltk, published on 30 Jun 2026. \nExploitation: There is no known exploitation of CVE-2026-12243 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- nltk (PyPI): affected all versions up to 3.9.4; no fix listed\n- nltk (PyPI): affected all versions; fixed in 3.10.0\n- nltk (PyPI): affected all versions; fixed in 3.10.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-12243/ (Markdown: https://insights.sbomify.com/CVE-2026-12243/index.md)","id":"CVE-2026-12243","markdown":"https://insights.sbomify.com/CVE-2026-12243/index.md","name":"CVE-2026-12243","record":{"aliases":["ECHO-e9a7-921d-59ae","GHSA-m42h-3232-vpv3","MINI-6f5r-h3p9-442v","PYSEC-2026-597","UBUNTU-CVE-2026-12243"],"analysis":null,"analysis_generated_by":null,"assigner":"@huntr_ai","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":"2026-08-29","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-08-29T16:15:44Z","kind":"github_poc","ref":"https://github.com/morzelowski/CVE-2026-12243-NLTK-PoC","stars":0,"title":null}],"tier":"poc_unverified"},"has_fix":true,"headline":"nltk: Arbitrary File Read via Path Traversal in nltk.data.load() through Percent-Encoded Sequences","id":"CVE-2026-12243","indexable":false,"kev":null,"kind":"cve_rejected","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2026"},"n_packages":3,"n_references":0,"next":{"headline":"Heap overflow and crash with crafted SVCB RR","id":"CVE-2026-12244"},"packages":[{"ecosystem":"PyPI","fixed":[],"introduced":["0"],"last_affected":["3.9.4"],"package":"nltk","purl":"pkg:pypi/nltk","source":"PYSEC-2026-597"},{"ecosystem":"PyPI","fixed":["3.10.0"],"introduced":["0"],"last_affected":[],"package":"nltk","purl":null,"source":"GHSA-m42h-3232-vpv3"},{"ecosystem":"PyPI","fixed":["3.10.0"],"introduced":["0"],"last_affected":[],"package":"nltk","purl":"pkg:pypi/nltk","source":"GHSA-m42h-3232-vpv3"}],"prev":{"headline":"AdRotate Banner Manager \u003c= 5.17.7 - Authenticated (Contributor+) PHP Code Injection via 'banner' Shortcode Attribute","id":"CVE-2026-12242"},"products":[],"published":"2026-06-30","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"REJECTED","updated":"2026-08-18","vendors":[]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-12243/"}