GCD AI RADAR
incidents/AIR-2026-0959

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

Attack on AI2 Disclosed vulnerabilityInfrastructure vulnerability

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

Details

type
Attack on AI
An AI model, agent or AI-powered product was the thing exploited, abused or leaked.
categories
  • Infrastructure vulnerability
    CVEs and advisories in AI frameworks, inference servers, MCP servers, AI developer tools and hosting stacks.
owasp llm top 10
mitre atlas
no technique for these categories
Both rows are derived from the type and categories (OWASP 2025 edition, ATLAS release 2026.09), not classified per record. How
severity
2 · Disclosed vulnerability
CVE or vendor advisory, patched or patchable, no confirmed exploitation.
targets
Microsoft
products
GitHub Copilot, Visual Studio
incident date
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.
classifier confidence
0.95 · published at or above 0.80; see the methodology
tags
CVE-2026-21257 · github-copilot · privilege-escalation
record
created 2026-10-18 10:04Z · updated 2026-10-18 10:04Z · json

Sources · 1

  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 GCD AI RADAR in its own words; data is CC BY-SA 4.0.

Related incidents