PyPI/jupyter-server CVE-2026-35397: high 7.1, EPSS 0.67%
Jupyter Server: Path Traversal via incorrect startswith() root directory check allows access to sibling directories
Action: Upgrade jupyter-server to 2.18.0 or later.
pip install jupyter-server==2.18.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.18.0 | - |
Fixed versions
| 2.18.0 |
Sources
- osv: GHSA-5789-5fc7-67v3
- https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-5789-5fc7-67v3
- https://nvd.nist.gov/vuln/detail/CVE-2026-35397
- https://access.redhat.com/errata/RHSA-2026:43038
- https://access.redhat.com/errata/RHSA-2026:60520
- https://access.redhat.com/security/cve/CVE-2026-35397
- https://bugzilla.redhat.com/show_bug.cgi?id=2466858
- https://github.com/jupyter-server/jupyter_server
- https://github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2026-68.yaml
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35397.json
CVE-2026-35397 · published · modified · JSON