CVE-2026-59831 | THREATINT

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.

PUBLISHED Reserved 2026-07-07 | Published 2026-07-09 | Updated 2026-07-14 | Assigner GitHub_M

MEDIUM: 4.4CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N

Problem types

CWE-829: Inclusion of Functionality from Untrusted Control Sphere

Product status

>= 2.10.0, < 2.96.0

affected

References

github.com/cli/cli/security/advisories/GHSA-8cg3-r6g9-fpg2

github.com/...ommit/b300f2ec7ec9dc9addc39b2ad88c54097ded7ca0

github.com/cli/cli/releases/tag/v2.96.0

cve.org (CVE-2026-59831)

nvd.nist.gov (CVE-2026-59831)

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