CVE-2026-59831 | GitHub CLI (gh) is GitHub’s official command line tool. From… | CVSS 4.4 MEDIUM

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.

Metadata

CVE ID: CVE-2026-59831
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-07-07 15:00 UTC
Published: 2026-07-09 22:11 UTC
Last updated: 2026-07-09 22:11 UTC
Primary CWE: CWE-829
CWE-829: Inclusion of Functionality from Untrusted Control S…
Vendor / Product: cli / cli
Sources: cve.org · NVD

Severity & Metrics

4.4 MEDIUM CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
cli	cli	—	>= 2.10.0, < 2.96.0

Weakness (CWE)

CWE	Source	Description
CWE-829	cna	CWE-829: Inclusion of Functionality from Untrusted Control Sphere

CVSS scores (1)

Score	Severity	Version	Source	Vector
4.4	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N

References (3)

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