Vulnerabilities CVE-2026-59831

CVE-2026-59831

Medium

Open

TLP:CLEAR

GitHub CLI `gh codespace jupyter` could allow remote code execution when connecting to a malicious Codespace

NVD CVE.org

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Description

GitHub CLI (gh) is GitHub’s official command line tool. From 2.10.0 through 2.95.0, connecting to a malicious Codespace with gh codespace jupyter can allow command execution because the command opens a JupyterLab URL supplied by a process inside the Codespace without validating that it is a loopback HTTP or HTTPS address, allowing a crafted vscode:// or vscode-insiders:// URL to be handed to VS Code. This issue is fixed in version 2.96.0.

Details

CVSS Score: 4.4
EPSS Score ⓘ: 0.26%

17.8th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
Confidence: 90%
Published: Jul 9, 2026
Last Modified: Jul 14, 2026

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