CVE-2026-21516

highpriority · track · 31EPSS 0.009 · 60 %ileDEEUNLRUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.92% (60th) EPSS

CVSS 7.8 · high

Is it mine?

22 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Improper neutralization of special elements used in a command ('command injection') in Github Copilot allows an unauthorized attacker to execute code over a network.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedGitHub Copilot Plugin for JetBrains IDEsmsrc_csaf
1.5.63:Security Update:https://plugins.jetbrains.com/plugin/17718-github-copilot--your-ai-pair-programmer/versions/stable/933548
https://plugins.jetbrains.com/plugin/17718-github-copilot--your-ai-pair-programmer/versions/stable/933548

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.18.8highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 2.8 · impact 5.9

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · NCSC-NL NL

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-77USCWE-77USCWE-77USCWE-77US

affected products (22)

Products and version ranges known to be affected.

Microsoft GitHub Copilot Plugin for JetBrains IDEsall versionscert_bundDEcpe:/a:microsoft:github_copilot:plugin_for_jetbrains_ides
Microsoft GitHub Copilot Plugin for JetBrains IDEs1.0.0 → 1.5.63enisa_euvdEU
Microsoft Corp GitHub Copilot Plugin for JetBrains IDEs≤ 1.5.63fstec_bduRU
GitHub Copilot Plugin for JetBrains IDEsall versionsfixedmsrc_csafUS
GitHub Copilot Plugin for JetBrains IDEs< 1.5.63msrc_csafUS
Microsoft .NET 10.0≤ vers:unknown/*ncsc_nlNL
Microsoft .NET 10.0 installed on Linux≤ vers:unknown/*ncsc_nlNL
Microsoft .NET 10.0 installed on Mac OS≤ vers:unknown/*ncsc_nlNL
Microsoft .NET 10.0 installed on Windows≤ vers:unknown/*ncsc_nlNL
Microsoft .NET 8.0≤ vers:unknown/*ncsc_nlNL
Microsoft .NET 8.0 installed on Linux≤ vers:unknown/*ncsc_nlNL
Microsoft .NET 8.0 installed on Mac OS≤ vers:unknown/*ncsc_nlNL
Microsoft .NET 8.0 installed on Windows≤ vers:unknown/*ncsc_nlNL
Microsoft .NET 9.0≤ vers:unknown/*ncsc_nlNL
Microsoft .NET 9.0 installed on Linux≤ vers:unknown/*ncsc_nlNL
Microsoft .NET 9.0 installed on Mac OS≤ vers:unknown/*ncsc_nlNL
Microsoft .NET 9.0 installed on Windows≤ vers:unknown/*ncsc_nlNL
Microsoft GitHub Copilot Plugin for JetBrains IDEs≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Visual Studio 2022 version 17.14≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Visual Studio 2022 version 18.3≤ vers:unknown/*ncsc_nlNL

showing 20 of 22

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2026-0056Kwetsbaarheden verholpen in Microsoft Developer ToolsNL2026-02-10csaf · ncsc_nlNL
Microsoft heeft kwetsbaarheden verholpen in diverse componenten van Visual Studio en .NET.
WID-SEC-W-2026-0368Microsoft GitHub Copilot für JetBrains: Schwachstelle ermöglicht CodeausführungDeutsch2026-02-10csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Microsoft GitHub Copilot ausnutzen, um beliebigen Programmcode auszuführen.
msrc_CVE-2026-21516GitHub Copilot for Jetbrains Remote Code Execution Vulnerability2026-02-10csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund msrc_csaf ncsc_nl NVD CVE.org MITRE

published 2026-02-10modified 2026-06-17

references (3)

External citations — patches, advisories, analysis.

scry

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