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NVD description
Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an unauthorized attacker to execute code over a network.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
CVE-2026-21256 Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio allows an unauthorized attacker to execute cod… https://www.cve.org/CVERecord?id=CVE-2026-21256
Post summary
The text announces CVE‑2026‑21256, a command injection flaw in GitHub Copilot and Visual Studio, without providing PoC, exploit, or patch information.
CVE-2026-21256: GitHub Copilot command injection—RCE via network traffic on your IDE. We gave devs an AI that hallucinates bad code AND serves as a Trojan horse. Industry wanted AI-powered SDLC. Got AI-powered initial access instead.
Post summary
The post announces CVE-2026-21256, describing a command injection that enables remote code execution in GitHub Copilot via IDE network traffic, highlighting the risk of AI hallucinations.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | microsoft | visual_studio_2022 | - | - | - |