{"id":"CVE-2020-26215","aliases":["BIT-jupyter-base-notebook-2020-26215","BIT-jupyter-notebook-2020-26215","GHSA-c7vm-f5p4-8fqh","PYSEC-2020-215"],"url":"https://o3.security/vulnerability/CVE-2020-26215","summary":"Open redirect in Jupyter Notebook","details":"### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nOpen redirect vulnerability - a maliciously crafted link to a notebook server could redirect the browser to a different website.\n\nAll notebook servers are technically affected, however, these maliciously crafted links can only be reasonably made for known notebook server hosts. A link to your notebook server may *appear* safe, but ultimately redirect to a spoofed server on the public internet.\n\n### Patches\n\n_Has the problem been patched? What versions should users upgrade to?_\n\nPatched in notebook 6.1.5\n\n\n### References\n\n[OWASP page on open redirects](https://cheatsheetseries.owasp.org/cheatsheets/Unvalidated_Redirects_and_Forwards_Cheat_Sheet.html)\n\n### For more information\n\nIf you have any questions or comments about this advisory, or vulnerabilities to report, please email our security list [security@ipython.org](mailto:security@ipython.org).\n\nCredit: zhuonan li of Alibaba Application Security Team","published":"2020-11-18T22:15:11.947Z","modified":"2026-08-07T11:48:28.845880208Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"notebook","fixedVersion":"6.1.5"}],"fix":{"url":"https://github.com/jupyter/notebook/commit/3cec4bbe21756de9f0c4bccf18cf61d840314d74","label":"jupyter/notebook@3cec4bb"},"references":[{"type":"ADVISORY","url":"https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqh"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00004.html"},{"type":"FIX","url":"https://github.com/jupyter/notebook/commit/3cec4bbe21756de9f0c4bccf18cf61d840314d74"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26215"},{"type":"PACKAGE","url":"https://github.com/jupyter/notebook"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/notebook/PYSEC-2020-215.yaml"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:48:28.845880208Z"}}