CVE-2026-35397: Jupyter Server: Path Traversal via incorrect startswith() root directory check allows access to sibling directories
(updated )
Jupyter Server <=2.17.0 can access directories sibling to the root directory, if it starts with the root dir’s name.
References
- access.redhat.com/errata/RHSA-2026:43038
- access.redhat.com/errata/RHSA-2026:60520
- access.redhat.com/security/cve/CVE-2026-35397
- bugzilla.redhat.com/show_bug.cgi?id=2466858
- github.com/advisories/GHSA-5789-5fc7-67v3
- github.com/jupyter-server/jupyter_server/security/advisories/GHSA-5789-5fc7-67v3
- github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2026-68.yaml
- nvd.nist.gov/vuln/detail/CVE-2026-35397
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35397.json
Code Behaviors & Features
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