# CVE-2023-39968: jupyter-server: jupyter-server is the backend for Jupyter web applications

CVE-2023-39968 is fixed in jupyter-server on 1 platform, first by DEBIAN-CVE-2023-39968, released August 28, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-39968
- Priority: Routine
- CVSS: 6.1 (medium)
- EPSS: 0.0068
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 28, 2023

## Description

jupyter-server is the backend for Jupyter web applications. Open Redirect Vulnerability. Maliciously crafted login links to known Jupyter Servers can cause successful login or an already logged-in session to be redirected to arbitrary sites, which should be restricted to Jupyter Server-served URLs. This issue has been addressed in commit `29036259` which is included in release 2.7.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | jupyter-server Debian 13.5 (trixie) | 2.14.2-1 | [DEBIAN-CVE-2023-39968](https://patchblox.com/security/data/fix/linux/debian-cve-2023-39968.md) | Aug 28, 2023 |
| Linux | jupyter-server Debian 14 | 2.14.2-1 | [DEBIAN-CVE-2023-39968](https://patchblox.com/security/data/fix/linux/debian-cve-2023-39968.md) | Aug 28, 2023 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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