What is CVE-2026-59831?

CVE-2026-59831 is a medium-severity vulnerability in Cli, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 4.4/10. Published 2026-07-09.

How severe is CVE-2026-59831?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Cli

CVE-2026-59831

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…

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Cli — versions >= 2.10.0, < 2.96.0

Weakness classification (CWE)

CWE-829 — Inclusion of Functionality from Untrusted Control Sphere

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-59831?: CVE-2026-59831 is a medium-severity vulnerability in Cli, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 4.4/10. Published 2026-07-09.
How severe is CVE-2026-59831?: Medium severity. CVSS v3 base score is 4.4 out of 10.