CVE-2026-59831

mediumCVSS 4.4covered by 1 sourcefirst seen 2026-07-09

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.

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Exploitation outlook

Low exploitation risk0.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-59831: GitHub CLI (gh) is GitHub’s official command line tool. From 2.10.0 through 2.95.0, connecting…nvd · 2026-07-09

External references

NVD record for CVE-2026-59831

CVE.org record

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