Description
The Jupyter Server provides the backend (i.e. the core services, APIs, and REST endpoints) for Jupyter web applications. Prior to version 1.15.4, unauthorized actors can access sensitive information from server logs. Anytime a 5xx error is triggered, the auth cookie and other header values are recorded in Jupyter Server logs by default. Considering these logs do not require root access, an attacker can monitor these logs, steal sensitive auth/cookie information, and gain access to the Jupyter server. Jupyter Server version 1.15.4 contains a patch for this issue. There are currently no known workarounds.
References (2)
Core 2
Core References
Third Party Advisory x_refsource_confirm
https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-p737-p57g-4cpr
Patch, Third Party Advisory x_refsource_misc
https://github.com/jupyter-server/jupyter_server/commit/a5683aca0b0e412672ac6218d09f74d44ca0de5a
Scores
CVSS v3
7.5
EPSS
0.0032
EPSS Percentile
54.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-532
Status
published
Products (2)
jupyter/jupyter_server
< 1.15.4
pypi/jupyter-server
0 - 1.15.4PyPI
Published
Mar 23, 2022
Tracked Since
Feb 18, 2026