{"answers":{"affected":"2 open source packages ship an affected version, including jupyter-server.","exploited":"There is no known exploitation of CVE-2026-114135 in the wild and no public exploit code.","fix":"Upgrade jupyter-server to 2.6.0 or later.","what":"CVE-2026-114135 is a high-severity vulnerability in jupyter-server jupyter_server, published on 21 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-114135 and fix it if it is affected.\n\nWhat it is: CVE-2026-114135 is a high-severity vulnerability in jupyter-server jupyter_server, published on 21 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-114135 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- jupyter-server (PyPI): affected from 2.0.0; fixed in 2.6.0\n- jupyter-server (PyPI): affected from 2.0.0; fixed in 2.6.0\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-2026-114135/ (Markdown: https://insights.sbomify.com/CVE-2026-114135/index.md)","id":"CVE-2026-114135","markdown":"https://insights.sbomify.com/CVE-2026-114135/index.md","name":"CVE-2026-114135","record":{"aliases":["DEBIAN-CVE-2026-114135","GHSA-354v-3q48-cv69","UBUNTU-CVE-2026-114135"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-862","name":"Missing Authorization"}],"description":"Jupyter Server is the backend for Jupyter web applications. From 2.0.0 until 2.6.0, enabling GatewayClient.url replaced the normal KernelWebsocketHandler with WebSocketChannelsHandler, which authenticated the user but did not call authorizer.is_authorized(...) for the execute action on the kernels resource. A restricted authenticated user could therefore open an upstream kernel channel and obtain kernel execution despite the configured Authorizer denying that action, exposing data and credentials available to the kernel and permitting modification or disruption of the kernel environment. The default gateway configuration is fixed in version 2.6.0. In 2.6.0 and later, the same authorization bypass remains possible when a deployment manually registers the deprecated jupyter_server.gateway.handlers module, because its handler still omits the configured kernel-execute authorization decision.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Jupyter Server: Gateway WebSocket handler bypasses kernel execute authorization","id":"CVE-2026-114135","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"Django REST framework: JSONParser applies an attacker-named codec to the request stream","id":"CVE-2026-114136"},"packages":[{"ecosystem":"PyPI","fixed":["2.6.0"],"introduced":["2.0.0"],"last_affected":[],"package":"jupyter-server","purl":null,"source":"GHSA-354v-3q48-cv69"},{"ecosystem":"PyPI","fixed":["2.6.0"],"introduced":["2.0.0"],"last_affected":[],"package":"jupyter-server","purl":"pkg:pypi/jupyter-server","source":"GHSA-354v-3q48-cv69"}],"prev":{"headline":"Nuxt server islands render `useHeadSafe` input without sanitisation","id":"CVE-2026-114133"},"products":["jupyter_server"],"published":"2026-10-21","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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-28","vendors":["jupyter-server"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-114135/"}