{"id":"CVE-2020-26215","aliases":["GHSA-c7vm-f5p4-8fqh","BIT-jupyter-base-notebook-2020-26215","BIT-jupyter-notebook-2020-26215","PYSEC-2020-215"],"title":"Open redirect in Jupyter Notebook","summary":"Open redirect in Jupyter Notebook","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:L","vendor":"notebook","product":"notebook","ecosystem":"pip","affected":["notebook < 6.1.5"],"patched":["notebook 6.1.5"],"published":"2020-11-18","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:48:35.602791913Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-c7vm-f5p4-8fqh","references":[{"url":"https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqh"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26215"},{"url":"https://github.com/jupyter/notebook/commit/3cec4bbe21756de9f0c4bccf18cf61d840314d74"},{"url":"https://github.com/jupyter/notebook"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/notebook/PYSEC-2020-215.yaml"},{"url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00004.html"}],"tags":["osv","pip"],"epss":0.01228,"epssPercentile":0.67604,"ingestedAt":"2026-09-12T03:13:01.687Z","slug":"CVE-2020-26215","body":"## Overview\n\n### 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\n\n## Affected packages\n\n- `notebook < 6.1.5`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `notebook 6.1.5`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}