{"id":"CVE-2020-26232","aliases":["GHSA-grfj-wjv9-4f9v","PYSEC-2020-234"],"url":"https://o3.security/vulnerability/CVE-2020-26232","summary":"Open redirect in Jupyter Server","details":"### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nOpen redirect vulnerability - a maliciously crafted link to a jupyter server could redirect the browser to a different website.\n\nAll jupyter servers are technically affected, however, these maliciously crafted links can only be reasonably made for known jupyter server hosts. A link to your jupyter server may *appear* safe, but ultimately redirect to a spoofed server on the public internet.\n\nThis originated in jupyter/notebook: https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqh\n\n### Patches\n\n_Has the problem been patched? What versions should users upgrade to?_\n\njupyter_server 1.0.6\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":"2020-11-24T21:15:11.557Z","modified":"2026-10-05T10:26:47.990688758Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"jupyter-server","fixedVersion":"1.0.6"}],"fix":{"url":"https://github.com/jupyter-server/jupyter_server/commit/3d83e49090289c431da253e2bdb8dc479cbcb157","label":"jupyter-server/jupyter_server@3d83e49"},"references":[{"type":"ADVISORY","url":"https://github.com/jupyter-server/jupyter_server/blob/master/CHANGELOG.md#106---2020-11-18"},{"type":"ADVISORY","url":"https://github.com/jupyter/jupyter_server/security/advisories/GHSA-grfj-wjv9-4f9v"},{"type":"FIX","url":"https://github.com/jupyter-server/jupyter_server/commit/3d83e49090289c431da253e2bdb8dc479cbcb157"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26232"},{"type":"PACKAGE","url":"https://github.com/jupyter-server/jupyter_server"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2020-234.yaml"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-05T10:26:47.990688758Z"}}