Quick answers
- Is CVE-2026-83953 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-83953 being exploited in the wild.
- How severe is CVE-2026-83953?
- Medium severity, with a CVSS score of 5.5, published 10 November 2026.
- Which products and versions are affected?
- GitHub Copilot.
- Is there a fix for CVE-2026-83953?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-83953 attacked?
- It is attacked with local access, in a hosted service.
- Am I affected by CVE-2026-83953?
- Check whether you run GitHub Copilot. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a command injection flaw in GitHub Copilot that fails to properly neutralize special elements in commands. An authenticated attacker can inject malicious input to execute arbitrary commands locally on the affected system. The attack requires an authorized user and local access context, allowing information disclosure.
Affected products
- GitHub Copilot
Timeline
- 2026-11-10: disclosed