CVE-2026-59831 — GitHub CLI `gh codespace jupyter` could allow remote code execution when connecting to a malicious Codespace
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 bec…
Published: 2026-07-09 · CVSS: 4.4 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7