CVE-2026-59831

MEDIUMPre-NVD 4.44.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 90% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
4.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
4.4
EG Score
4.4(medium)
EPSS
9.8%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 10, 2026

Advisory Details (3)

Auto-updated Jul 9, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

Connecting to a malicious Codespace via `gh codespace jupyter` could allow command execution on the user's computer · Advisory · cli/cli · GitHub

https://github.com/cli/cli/security/advisories/GHSA-8cg3-r6g9-fpg2
github_release Patch Available

GitHub CLI 2.96.0

Patch available: cli/cli v2.96.0

https://github.com/cli/cli/releases/tag/v2.96.0
github_commit

commit b300f2ec7ec9 (cli/cli)

Fix landed in cli/cli commit b300f2ec7ec9 — awaiting tagged release

https://github.com/cli/cli/commit/b300f2ec7ec9dc9addc39b2ad88c54097ded7ca0

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 6× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 21:56 UTCEG score recompute
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-10 22:25 UTCEG score recompute
  5. 2026-07-09 22:46 UTCEG score recompute
  6. 2026-07-09 22:45 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-59831?
CVE-2026-59831 is a medium vulnerability published on July 9, 2026. 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…
When was CVE-2026-59831 disclosed?
CVE-2026-59831 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59831 actively exploited?
CVE-2026-59831 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-59831?
CVE-2026-59831 has a CVSS v3 base score of 4.4 (NVD).
How do I remediate CVE-2026-59831?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59831, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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