Bug 2491991 - CVE-2026-44727 python-jupyter-server: Jupyter Server: Remote Code Execution via stored Cross-Site Scripting in nbconvert handlers [fedora-43]
Summary: CVE-2026-44727 python-jupyter-server: Jupyter Server: Remote Code Execution v...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: python-jupyter-server
Version: 43
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Lumír Balhar
QA Contact:
URL:
Whiteboard: {"flaws": ["c4fa59be-7ba4-4b70-8864-f...
Depends On:
Blocks: CVE-2026-44727
TreeView+ depends on / blocked
 
Reported: 2026-06-23 21:36 UTC by jjulien
Modified: 2026-07-05 00:50 UTC (History)
2 users (show)

Fixed In Version: python-jupyter-server-2.20.0-1.fc43
Clone Of:
Environment:
Last Closed: 2026-07-05 00:50:03 UTC
Type: ---
Embargoed:

Attachments (Terms of Use)

Description jjulien 2026-06-23 21:36:41 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Comment 1 Fedora Update System 2026-06-26 16:27:16 UTC 
FEDORA-2026-dd1d19e58b (python-jupyter-server-2.20.0-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-dd1d19e58b
Comment 2 Fedora Update System 2026-06-26 16:35:14 UTC 
FEDORA-2026-275d2ecbbd (python-jupyter-server-2.20.0-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-275d2ecbbd
Comment 3 Fedora Update System 2026-06-27 01:45:24 UTC 
FEDORA-2026-275d2ecbbd has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-275d2ecbbd`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-275d2ecbbd

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 4 Fedora Update System 2026-06-27 01:58:34 UTC 
FEDORA-2026-dd1d19e58b has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-dd1d19e58b`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-dd1d19e58b

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 5 Fedora Update System 2026-07-05 00:50:03 UTC 
FEDORA-2026-275d2ecbbd (python-jupyter-server-2.20.0-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.
Note You need to log in before you can comment on or make changes to this bug.