GHSA-v42x-x7jp-845h

Source

https://github.com/advisories/GHSA-v42x-x7jp-845h

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-v42x-x7jp-845h/GHSA-v42x-x7jp-845h.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-v42x-x7jp-845h

Aliases

Withdrawn

2026-07-31T20:25:54Z

Published

2026-06-03T18:33:10Z

Modified

2026-07-31T20:30:21Z

Severity

6.1 (Medium) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator

Summary

Duplicate Advisory: jupyter-server is vulnerable to CORS origin validation bypass when the `allow_origin_pat` configuration is used

Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-24qx-w28j-9m6p. This link is maintained to preserve external references.

Original Description

A vulnerability in jupyter-server versions 1.12.0 through 2.17.0 allows an attacker to bypass CORS origin validation when the allow_origin_pat configuration is used. The issue arises from the use of re.match() for validating the Origin header, which only anchors at the start of the string. This allows attacker-controlled domains such as trusted.example.com.evil.com to pass validation against patterns intended to match trusted.example.com. The vulnerability affects multiple locations in the codebase, including CORS headers, WebSocket connections, referer validation, and login redirects, potentially enabling phishing attacks, arbitrary code execution, and unauthorized access to sensitive API responses.

Database specific

{
    "cwe_ids":  [
        "CWE-346"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-07-13T17:46:17Z",
    "nvd_published_at":  "2026-06-03T16:16:31Z",
    "severity":  "MODERATE"
}

References

Affected packages

PyPI / jupyter-server

Package

Name: jupyter-server; View open source insights on deps.dev
Purl: pkg:pypi/jupyter-server

Affected ranges

Type: ECOSYSTEM
Events: Introduced

1.12.0

Last Affected

2.17.0

Affected versions

1.*

1.12.0

1.12.1

1.13.0

1.13.1

1.13.2

1.13.3

1.13.4

1.13.5

1.15.0

1.15.1

1.15.2

1.15.3

1.15.4

1.15.5

1.15.6

1.16.0

1.17.0

1.17.1

1.18.0

1.18.1

1.19.0

1.19.1

1.21.0

1.23.0

1.23.1

1.23.2

1.23.3

1.23.4

1.23.5

1.23.6

1.24.0

2.*

2.0.0a0

2.0.0a1

2.0.0a2

2.0.0b0

2.0.0b1

2.0.0rc0

2.0.0rc1

2.0.0rc2

2.0.0rc3

2.0.0rc4

2.0.0rc5

2.0.0rc6

2.0.0rc7

2.0.0rc8

2.0.0

2.0.1

2.0.2

2.0.3

2.0.4

2.0.5

2.0.6

2.0.7

2.1.0

2.2.0

2.2.1

2.3.0

2.4.0

2.5.0

2.6.0

2.7.0

2.7.1

2.7.2

2.7.3

2.8.0

2.9.0

2.9.1

2.10.0

2.10.1

2.11.0

2.11.1

2.11.2

2.12.0

2.12.1

2.12.2

2.12.3

2.12.4

2.12.5

2.13.0

2.14.0

2.14.1

2.14.2

2.15.0

2.16.0

2.17.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-v42x-x7jp-845h/GHSA-v42x-x7jp-845h.json"