Medium severity · published Aug 28, 2023
CVE-2023-40170
jupyter-server is the backend for Jupyter web applications
6.1
CVSS
0.6%
EPSS
No
On KEV
Description
jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via "Open image in new tab". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JS
Jupyter Server · Jupyter
before 2.7.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-40170
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-40170
Patch
https://github.com/jupyter-server/jupyter_server/commit/87a4927272819f0b1cae1afa4c8c86ee2da002fd
Vendor Advisory
https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-64x5-55rw-9974
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NRP7DNZYVOIA4ZB3U3ZWKTFZEPYWNGCQ/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XDKQAWQN6SQTOVACZNXYKEHWQXGG4DOF/
More from Jupyter Server
8.8
CVE-2026-6657
CORS Origin Validation Bypass in jupyter-server
8.8
CVE-2026-35397
jupyter-server path traversal allows access to sibling directories sharing root_dir name prefix
8.8
CVE-2022-29241
Jupyter Server provides the backend (i.e
8.1
CVE-2026-5422
Path Traversal in jupyter/jupyter
7.5
CVE-2024-35178
The Jupyter Server provides the backend for Jupyter web applications