Detections
Analytics

SCA: security update for jupyter-server (GHSA-5mrq-x3x5-8v8f)

high Tenable Self-Hosted Container Security Plugin ID 441556

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, the secret
 used to sign authentication cookies is persisted to a static file at
 ~/.local/share/jupyter/runtime/jupyter_cookie_secret and is never rotated when a user changes their
 password. After a password reset and server restart, any previously issued authentication cookie remains
 cryptographically valid because the signing key has not changed. An attacker who has captured a session
 cookie through any means retains full authenticated access to the server regardless of subsequent password
 changes. This affects deployments using password-based authentication, particularly shared or public-
 facing servers where credential rotation is expected to revoke existing sessions. This issue has been
 fixed in version 2.18.0. (CVE-2026-40934)

Solution

Update the jupyter-server library and its related packages to version 2.18.0 or later.

See Also

https://github.com/advisories/GHSA-5mrq-x3x5-8v8f

Plugin Details

Severity: High

ID: 441556

Version: Revision 1.8

Type: Local

Family: SCA Checks

Published: 5/8/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.63

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 6.6

Temporal Score: 5.2

Vector: CVSS2#AV:N/AC:H/Au:S/C:C/I:C/A:N

CVSS Score Source: CVE-2026-40934

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 6.1

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.6

Threat Score: 6.7

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/5/2026

Vulnerability Publication Date: 5/5/2026

Reference Information

CVE: CVE-2026-40934

cwe: CWE-613