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Vulnerability details: VCID-xdj2-ghy5-ybdw
Vulnerability ID VCID-xdj2-ghy5-ybdw
Aliases BIT-jupyter-base-notebook-2020-26215
BIT-jupyter-notebook-2020-26215
CVE-2020-26215
GHSA-c7vm-f5p4-8fqh
PYSEC-2020-215
Summary Jupyter Notebook before version 6.1.5 has an Open redirect vulnerability. A maliciously crafted link to a notebook server could redirect the browser to a different website. All 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. The issue is patched in version 6.1.5.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk None
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
System Score Found at
epss 0.00772 https://api.first.org/data/v1/epss?cve=CVE-2020-26215
cvssv3.1 4.4 https://github.com/jupyter/notebook
cvssv4 2.0 https://github.com/jupyter/notebook
generic_textual LOW https://github.com/jupyter/notebook
cvssv3.1 4.4 https://github.com/jupyter/notebook/commit/3cec4bbe21756de9f0c4bccf18cf61d840314d74
cvssv4 2.0 https://github.com/jupyter/notebook/commit/3cec4bbe21756de9f0c4bccf18cf61d840314d74
generic_textual LOW https://github.com/jupyter/notebook/commit/3cec4bbe21756de9f0c4bccf18cf61d840314d74
cvssv3.1 4.4 https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqh
cvssv4 2.0 https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqh
generic_textual LOW https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqh
cvssv3.1 4.4 https://github.com/pypa/advisory-database/tree/main/vulns/notebook/PYSEC-2020-215.yaml
cvssv4 2.0 https://github.com/pypa/advisory-database/tree/main/vulns/notebook/PYSEC-2020-215.yaml
generic_textual LOW https://github.com/pypa/advisory-database/tree/main/vulns/notebook/PYSEC-2020-215.yaml
cvssv3.1 4.4 https://lists.debian.org/debian-lts-announce/2020/12/msg00004.html
cvssv4 2.0 https://lists.debian.org/debian-lts-announce/2020/12/msg00004.html
generic_textual LOW https://lists.debian.org/debian-lts-announce/2020/12/msg00004.html
cvssv3.1 4.4 https://nvd.nist.gov/vuln/detail/CVE-2020-26215
cvssv4 2.0 https://nvd.nist.gov/vuln/detail/CVE-2020-26215
generic_textual LOW https://nvd.nist.gov/vuln/detail/CVE-2020-26215
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-26215
https://github.com/jupyter/notebook
https://github.com/jupyter/notebook/commit/3cec4bbe21756de9f0c4bccf18cf61d840314d74
https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqh
https://github.com/pypa/advisory-database/tree/main/vulns/notebook/PYSEC-2020-215.yaml
https://lists.debian.org/debian-lts-announce/2020/12/msg00004.html
https://nvd.nist.gov/vuln/detail/CVE-2020-26215
USN-5585-1 https://usn.ubuntu.com/5585-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:L Found at https://github.com/jupyter/notebook
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:L Found at https://github.com/jupyter/notebook
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:L Found at https://github.com/jupyter/notebook/commit/3cec4bbe21756de9f0c4bccf18cf61d840314d74
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:L Found at https://github.com/jupyter/notebook/commit/3cec4bbe21756de9f0c4bccf18cf61d840314d74
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:L Found at https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqh
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:L Found at https://github.com/jupyter/notebook/security/advisories/GHSA-c7vm-f5p4-8fqh
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:L Found at https://github.com/pypa/advisory-database/tree/main/vulns/notebook/PYSEC-2020-215.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:L Found at https://github.com/pypa/advisory-database/tree/main/vulns/notebook/PYSEC-2020-215.yaml
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:L Found at https://lists.debian.org/debian-lts-announce/2020/12/msg00004.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:L Found at https://lists.debian.org/debian-lts-announce/2020/12/msg00004.html
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:L Found at https://nvd.nist.gov/vuln/detail/CVE-2020-26215
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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adjacent_network

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Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:L Found at https://nvd.nist.gov/vuln/detail/CVE-2020-26215
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Exploit Prediction Scoring System (EPSS)
Percentile 0.73877
EPSS Score 0.00772
Published At May 30, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-05-30T20:20:38.486859+00:00 Pypa Importer Import https://github.com/pypa/advisory-database/blob/main/vulns/notebook/PYSEC-2020-215.yaml 38.6.0