# CVE-2023-49080: jupyter-server errors include tracebacks with path information

Source: https://junglewise.ai/threats/cve-2023-49080-jupyter-server-errors-include-tracebacks-with-path-information  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-12-04  
License: CC BY 4.0 with a link back

CVE-2023-49080 · Severity: low · CVSS 3.1 · Published 2023-12-04

The Jupyter Server provides the backend (i.e. the core services, APIs, and REST endpoints) for Jupyter web applications like Jupyter notebook, JupyterLab, and Voila. Unhandled errors in API requests coming from an authenticated user include traceback information, which can include path information. There is no known mechanism by which to trigger these errors without authentication, so the paths revealed are not considered particularly sensitive, given that the requesting user has arbitrary execution permissions already in the same environment. A fix has been introduced in commit `0056c3aa52` which no longer includes traceback information in JSON error responses. For compatibility, the traceback field is present, but always empty. This commit has been included in version 2.11.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Technologies: [jupyter-server (PyPI)](https://junglewise.ai/threats/technologies/pypi-jupyter-server). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2023-49080 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2023-49080 being exploited in the wild.

**How severe is CVE-2023-49080?** Low severity, with a CVSS score of 3.1, published 4 December 2023.

**Which products and versions are affected?** jupyter-server (PyPI) ECOSYSTEM:introduced=0,fixed=2.11.2, GIT:introduced=0,fixed=0056c3aa52cbb28b263a7a609ae5f17618b36652|ECOSYSTEM:introduced=0,fixed=2.11.2.

**Is there a fix for CVE-2023-49080?** Yes. jupyter-server (PyPI): upgrade to 2.11.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2023-49080?** Check whether you run jupyter-server (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- jupyter-server (PyPI): upgrade to 2.11.2 or later

  ```sh
  pip install "jupyter-server>=2.11.2"
  ```


## Affected products

- jupyter-server (PyPI) ECOSYSTEM:introduced=0,fixed=2.11.2, GIT:introduced=0,fixed=0056c3aa52cbb28b263a7a609ae5f17618b36652|ECOSYSTEM:introduced=0,fixed=2.11.2

## Identifiers

- CVE-2023-49080
- GHSA-h56g-gq9v-vc8r
- PYSEC-2023-272

## Related threats

- [Jupyter Server authorization bypass in kernel gateway handlers](https://junglewise.ai/threats/cve-2026-114135-jupyter-server-is-the-backend-for-jupyter-web-applications-from)
- [Jupyter Server token leakage in 5xx error logs](https://junglewise.ai/threats/cve-2026-86049-jupyter-server-token-leakage-in-5xx-error-logs)
- [Jupyter Server stored XSS in nbconvert handlers](https://junglewise.ai/threats/cve-2026-44727-jupyter-server-stored-xss-in-nbconvert-handlers)
- [Jupyter Jupyter Server CORS bypass via improper origin validation](https://junglewise.ai/threats/cve-2026-6657-jupyter-jupyter-server-cors-bypass-via-improper-origin-validation)
- [Jupyter jupyter-server path traversal in _get_os_path](https://junglewise.ai/threats/cve-2026-5422-jupyter-jupyter-server-path-traversal-in-get-os-path)