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archive/Patch now/AIR-2026-0959
closedclosed 10 Feb 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-21257: Privilege Escalation via Command Injection in GitHub Copilot

GitHub Copilot, Visual Studio

An improper command neutralization flaw in GitHub Copilot and Visual Studio allows an authorized network attacker to elevate privileges. The vulnerability has been addressed by the vendor.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
8.0
EPSS
0.01 · top 41% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
10 Feb 2026
last update
10 Feb 2026
CVE ids
CVE-2026-21257other records

Timeline · 1

  1. 10 Feb 2026CVE-2026-21257: Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an…

Sources · 1

Advisories and databases

  1. 2026-02-10
    CVE-2026-21257: Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an…
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-21257

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Microsoft
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
github-copilotprivilege-escalation
dates
happened 10 Feb 2026 · first reported 10 Feb 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 10:04Z · updated 2026-10-18 10:04Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-21257: Privilege Escalation via Command Injection in GitHub Copilot

https://gcdradar.vercel.app/incidents/cve-2026-21257-privilege-escalation-via-command-injection-in · AIR-2026-0959 · closed 2026-02-10

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-02-10
- AI role: Attack on AI
- Products: GitHub Copilot, Visual Studio
- CVE ids: CVE-2026-21257
- CVSS: 8

## Summary

An improper command neutralization flaw in GitHub Copilot and Visual Studio allows an authorized network attacker to elevate privileges. The vulnerability has been addressed by the vendor.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-02-10: CVE-2026-21257: Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an… (https://nvd.nist.gov/vuln/detail/CVE-2026-21257)

## Sources

- 2026-02-10 NVD: CVE-2026-21257: Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an… https://nvd.nist.gov/vuln/detail/CVE-2026-21257

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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