{"action":"Upgrade @jupyterlab/help-extension to 4.5.7 or later.","affected":[{"fixed":"4.5.7","introduced":"0"}],"component":"@jupyterlab/help-extension","cve_ids":["CVE-2026-40171"],"ecosystem":"npm","epss":0.00476,"exploited":false,"fixed_versions":["4.5.7"],"ghsa_id":"GHSA-rch3-82jr-f9w9","id":"tcs_01M5KFXQEK9WWK3RXDXCXB6W5E","modified_at":"2026-09-10T03:51:03.066267538Z","published_at":"2026-04-30T17:25:47Z","references":["https://osv.dev/vulnerability/GHSA-rch3-82jr-f9w9","https://github.com/jupyter/notebook/security/advisories/GHSA-rch3-82jr-f9w9","https://nvd.nist.gov/vuln/detail/CVE-2026-40171","https://github.com/jupyter/notebook","https://jupyterlab.readthedocs.io/en/latest/user/commands.html#commands-in-markdown-output-and-files"],"severity":{"label":"high","score":8.4},"sources":[{"source":"osv","source_id":"GHSA-rch3-82jr-f9w9#npm/@jupyterlab/help-extension","url":"https://osv.dev/vulnerability/GHSA-rch3-82jr-f9w9"},{"source":"nvd","source_id":"CVE-2026-40171","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40171"}],"summary":"Jupyter Notebook Vulnerable to Authentication Token Theft via CommandLinker XSS"}