CVE-2026-5422
Description
A flaw was found in jupyter-server. This path traversal vulnerability exists due to insufficient validation of file paths, specifically an incorrect root directory boundary check and improper handling of directory traversal sequences. This allows a remote attacker with low privileges to bypass directory restrictions and gain unauthorized read and write access to files in sibling directories. This could lead to the exposure of sensitive data, particularly in shared hosting environments.
Statement
This Moderate vulnerability in jupyter-server allows a remote, low-privileged attacker to bypass directory restrictions. An incorrect root directory boundary check and improper handling of traversal sequences enable unauthorized read and write access to files in sibling directories. This poses a risk of sensitive data exposure, particularly in Red Hat OpenShift AI deployments utilizing shared hosting environments.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.8 | 8.1 | 6.8 |
| Attack Vector | Network | Network | Network |
| Attack Complexity | High | Low | High |
| Privileges Required | Low | Low | Low |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | High | High | High |
| Integrity Impact | High | High | High |
| Availability Impact | None | None | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
cve.org: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
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