CVE-2020-26275
Description
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. In Jupyter Server before version 1.1.1, an open redirect vulnerability could cause the jupyter server to redirect the browser to a different malicious website. All jupyter servers running without a base_url prefix are technically affected, however, these maliciously crafted links can only be reasonably made for known jupyter server hosts. A link to your jupyter server may *appear* safe, but ultimately redirect to a spoofed server on the public internet. This same vulnerability was patched in upstream notebook v5.7.8. This is fixed in jupyter_server 1.1.1. If upgrade is not available, a workaround can be to run your server on a url prefix: "jupyter server --ServerApp.base_url=/jupyter/".
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 1.1.1-1 |
| sid | Fixed | 1.1.1-1 |
| forky | Fixed | 1.1.1-1 |
| bullseye | Fixed | 1.1.1-1 |
| bookworm | Fixed | 1.1.1-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| PyPI | jupyter-server | <1.1.1 | 1.1.1 |
| PyPI | jupyter-server | | |
| PyPI | jupyter-server | <85e4abccf6ea9321d29153f73b0bd72ccb3a6bca||<1.1.1 | 85e4abccf6ea9321d29153f73b0bd72ccb3a6bca |
| PIP | jupyter-server | < 1.1.1 | 1.1.1 |
References
- https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-9f66-54xg-pc2c
- https://nvd.nist.gov/vuln/detail/CVE-2020-26275
- https://github.com/jupyter-server/jupyter_server/commit/85e4abccf6ea9321d29153f73b0bd72ccb3a6bca
- https://advisory.checkmarx.net/advisory/CX-2020-4291
- https://github.com/jupyter-server/jupyter_server
- https://github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2020-346.yaml
- https://github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2020-50.yaml
- https://pypi.org/project/jupyter-server
- https://pypi.org/project/jupyter-server/
- https://security-tracker.debian.org/tracker/CVE-2020-26275
- https://github.com/advisories/GHSA-9f66-54xg-pc2c
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.