Skip to content
Noroxi
NVD / CVE Program· CNA microsoft

CVE-2026-21518: GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability

HighCVSS 8.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.4% (FIRST EPSS); higher than 73.5% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: Microsoft Visual Studio Code CoPilot Chat Extension 0.37.1; Visual Studio Code 1.110.1.

Low priority for now. Upgrade to Microsoft Visual Studio Code CoPilot Chat Extension 0.37.1; Visual Studio Code 1.110.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.

Published
Feb 10, 2026
Updated
Aug 19, 2026
EPSS
1.4% · 73th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
8.8
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-21518

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits every 10 minutes on paid plans, on the hour on the free plan.

Your free account also gets you

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools, at most 30 a day (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for microsoft records
Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
microsoftvisual studio code

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

  • Microsoft Microsoft Visual Studio Code CoPilot Chat Extension

    • 0.27.0 and later · before 0.37.1affected

  • Microsoft Visual Studio Code

    • 1.0.0 and later · before 1.110.1affected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft visual studio codebefore 1.109.2

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-41034Visual Studio Code Remote Code Execution Vulnerability
    51Plan
  • CVE-2022-30129Visual Studio Code Remote Code Execution Vulnerability
    47Plan
  • CVE-2025-55319Agentic AI and Visual Studio Code Remote Code Execution Vulnerability
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-62453Nov 11, 2025 · GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability
    20Monitor
  • ← EarlierCVE-2025-64660Nov 20, 2025 · GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability
    32Monitor
  • Later →CVE-2026-21523Feb 10, 2026 · GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Microsoft Visual Studio Code CoPilot Chat Extension0.37.1 · Release NotesMicrosoft (MSRC)
Visual Studio Code1.110.1 · Release NotesMicrosoft (MSRC)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-55319152 days apartAgentic AI and Visual Studio Code Remote Code Execution Vulnerability
    39Monitor
  • CVE-2026-69370245 days apartVisual Studio Code Remote Code Execution Vulnerability
    35Monitor
  • CVE-2026-121662273 days apartVisual Studio Code Remote Code Execution Vulnerability
    34Monitor
  • CVE-2026-50520154 days apartVisual Studio Code Remote Code Execution Vulnerability
    33Monitor
  • CVE-2026-47285182 days apartVisual Studio Code Information Disclosure Vulnerability
    26Monitor
  • CVE-2026-81380210 days apartGitHub Copilot and Visual Studio Code Information Disclosure Vulnerability
    23Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records