CVE-2026-59831

4.4 mediumEPSS 0.3%

Medium (4.4). EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

4.4 medium

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-31)
CWE: CWE-829
Published: 2026-07-09
Modified: 2026-07-14
Record from: the NVD, synced 2026-10-19

References

https://github.com/cli/cli/commit/b300f2ec7ec9dc9addc39b2ad88c54097ded7ca0
https://github.com/cli/cli/releases/tag/v2.96.0
https://github.com/cli/cli/security/advisories/GHSA-8cg3-r6g9-fpg2

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