CVE-2026-21516: GitHub Copilot for Jetbrains Remote Code Execution Vulnerability
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-01 19:19 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
Improper neutralization of special elements used in a command (‘command injection’) in Github Copilot allows an unauthorized attacker to execute code over a network.
Description quoted from the CVE record (assigned by microsoft, published 2026-02-10).
Weakness: CWE-77: Improper Neutralization of Special Elements used in a Command (‘Command Injection’)
How it can be exploited
Exploitable over the network with low attack complexity needing no privileges and a user must take an action. Impact: confidentiality high, integrity high, availability high. 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
CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: no. Technical impact: total.
Public exploit evidence (Exploit Observer)
Also known as: BDU:2026-01743, CNVD-2026-12554, EUVD-2026-7333, GHSA-mjvv-wfm9-3vm3
Exploit Observer has no public exploit code that names this CVE or one of its aliases.
Vulnerability databases and vendor advisories (5)
Catalogue entries, not exploit evidence.
- Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2026-7333
- Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-mjvv-wfm9-3vm3
- Vulnerability database or vendor advisory: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-21516
- Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-21516
- Vulnerability database or vendor advisory: https://www.cnvd.org.cn/flaw/show/CNVD-2026-12554
1 more reference returned by Exploit Observer did not name this CVE or an alias, so they are left out.
VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.
Live scores
- EPSS
- 0.009
low predicted chance of attack - VEDAS
- 0.048
little exploit evidence - On CISA KEV
- Not listed
- Detection rule
- None yet
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| Microsoft GitHub Copilot Plugin for JetBrains IDEs | from 1.0.0 before 1.5.63 | Not stated |
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
Exploit Observer also maps it to: microsoft github_copilot, microsoft_corp github_copilot_plugin_for_jetbrains_ides.
How to fix it
Fixed versions stated in the CVE record: 1.5.63.
Vendor guidance:
- GitHub Copilot for Jetbrains Remote Code Execution Vulnerability (vendor-advisory, patch)
How to detect it
There is no open VEDAS detection rule for this bug yet. It is listed on the detection gaps page if CISA has confirmed attacks.
Advisories on this CVE
- GitHub Copilot 2026 (February 2026)
References
Vendor advisories and patches
- GitHub Copilot for Jetbrains Remote Code Execution Vulnerability (vendor-advisory, patch)
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.