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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| jupyter-server | jupyter_server | < 2.7.2 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | jupyter-server | 2.14.2-1 | — |
| Debian 13 | jupyter-server | 2.14.2-1 | — |
| Debian 12 | jupyter-server | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | jupyter-server | No fix yet | — |
| Ubuntu 26.04 LTS | jupyter-server | No fix yet | — |
| Ubuntu 25.10 | jupyter-server | No fix yet | — |
| Ubuntu 24.04 LTS | jupyter-server | No fix yet | — |
| Ubuntu 22.04 LTS | jupyter-server | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-jupyter-server | 2.20.0-1.3 | openSUSE-SU-2026:12012-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | jupyter-server | 2.7.3-r0 | — |
| Alpine v3.23 | jupyter-server | 2.7.3-r0 | — |
| Alpine v3.22 | jupyter-server | 2.7.3-r0 | — |
| Alpine v3.21 | jupyter-server | 2.7.3-r0 | — |
| Alpine v3.20 | jupyter-server | 2.7.3-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | jupyter-server | 2.7.3-r0 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | kubeflow-pipelines-visualization-server | 2.4.0-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | jupyter-server | < 2.7.2 | 2.7.2 | GHSA-64x5-55rw-9974 |
Advisories 1
- openSUSE-SU-2026:12012-1 python313-jupyter-server-2.20.0-1.3 on GA media SUSE / openSUSE Security Updates · Oct 5, 2026
References
- https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-64x5-55rw-9974
- https://github.com/jupyter-server/jupyter_server/commit/87a4927272819f0b1cae1afa4c8c86ee2da002fd
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XDKQAWQN6SQTOVACZNXYKEHWQXGG4DOF/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NRP7DNZYVOIA4ZB3U3ZWKTFZEPYWNGCQ/