CVE-2026-21523
GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability
HIGH 8.0
At a glance
- Source
- NVD
- EPSS
- EPSS 0.78 % · percentile 56 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- microsoft
- NVD status
- Analyzed
Description
Time-of-check time-of-use (toctou) race condition in GitHub Copilot and Visual Studio allows an authorized attacker to execute code over a network.
Weaknesses (CWE)
- CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C | microsoft |
| CVSS 3.1 | HIGH 8.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H | NVD · secure@microsoft.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-7345
- GCVE · GCVE-0-2026-21523
CERT-FR advisories
- CERTFR-2026-AVI-0153 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:microsoft:visual_studio_code:*:*:*:*:*:-:*:*< 1.109.2
Affected products
| Product | Versions |
|---|---|
| Microsoft · Microsoft Visual Studio Code CoPilot Chat Extension | affected 0.27.0 < 0.37.1 |
| Microsoft · Visual Studio Code | affected 1.0.0 < 1.110.1 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |