GitHub Copilot / GitHub Copilot

GitHub Copilot CERT_HAS_EXPIRED SSL Certificate Error

Fix GitHub Copilot CERT_HAS_EXPIRED SSL/TLS certificate error in VSCode Includes evidence for GitHub Copilot troubleshooting demand.

Source-backed Last updated May 11, 2026 1 source Needs local verification

Category: GitHub Copilot
Error signature: CERT_HAS_EXPIRED
Quick fix: Compare the failing environment with a known working setup, then change one configuration value at a time.
Updated: May 11, 2026
Verification status: Source-backed
Evidence: 1 public source URL

Before you change production

This page includes public source URLs in the imported troubleshooting record. Compare those references with your version and environment before applying changes.

Reproduce the smallest failing action and save non-secret logs before changing configuration.
Check versions for GitHub Copilot, related SDKs, package managers, CI runners, and hosting providers.
Change one setting or dependency at a time, then rerun the same failing command or request.
Avoid destructive commands, credential rotation, billing changes, or security relaxations without a rollback plan.

What this error means

CERT_HAS_EXPIRED is a GitHub Copilot failure pattern reported for developers trying to fix github copilot cert_has_expired ssl/tls certificate error in vscode. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

Stack Overflow question (score 7) shows 'CERT_HAS_EXPIRED' error when using GitHub Copilot in VSCode behind firewall. High community engagement indicates widespread issue. Affects paid Copilot subscribers in corporate networks.

Common causes

Developers see 'CERT_HAS_EXPIRED' error when GitHub Copilot's SSL certificate validation fails, typically due to corporate proxy or firewall intercepting HTTPS traffic. This completely blocks Copilot functionality and affects paid enterprise users.
Stack Overflow question (score 7) shows 'CERT_HAS_EXPIRED' error when using GitHub Copilot in VSCode behind firewall. High community engagement indicates widespread issue. Affects paid Copilot subscribers in corporate networks.

Quick fixes

Confirm the exact error signature matches CERT_HAS_EXPIRED.
Check the GitHub Copilot account, local tool state, and provider configuration involved in the failing workflow.
Compare the failing environment with a known working setup, then change one configuration value at a time.

Platform/tool-specific checks

Verify the command, editor, extension, or API client that produced the error.
Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

Capture the exact error message and the command, editor action, or request that triggered it.
Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
Review the source evidence below and compare it with your environment.
Apply one change at a time and rerun the smallest failing action.
Keep the working fix documented for the team or deployment environment.

How to prevent it

Keep provider/tool configuration documented.
Record non-secret diagnostics such as tool version, provider name, model name, and command path.
Add a lightweight check before CI or production workflows depend on the tool.

Diagnostic flow for this page

Match CERT_HAS_EXPIRED exactly before applying the quick fix.
Compare the failing environment with GitHub Copilot versions, account scope, provider settings, and deployment context.
Check the listed common causes in order, starting with the cause that best matches your logs.
Use the evidence status below to decide whether to confirm against public sources or official documentation.
Apply one reversible change, rerun the smallest failing action, and keep rollback notes.

FAQ

What does CERT_HAS_EXPIRED mean in GitHub Copilot?

CERT_HAS_EXPIRED indicates the workflow described by "GitHub Copilot CERT_HAS_EXPIRED SSL Certificate Error" failed in a GitHub Copilot context. Start by confirming the exact signature and the component that emitted it.

What should I check first for CERT_HAS_EXPIRED?

Check whether this cause matches your environment: Developers see 'CERT_HAS_EXPIRED' error when GitHub Copilot's SSL certificate validation fails, typically due to corporate proxy or firewall intercepting HTTPS traffic. This completely blocks Copilot functionality and affects paid enterprise users.

Is the CERT_HAS_EXPIRED guidance source-backed?

The "GitHub Copilot CERT_HAS_EXPIRED SSL Certificate Error" page is labeled source-backed. It has 1 public source URL from stackoverflow.com, so use that evidence status when deciding how much additional verification you need.

When should I avoid the quick fix for CERT_HAS_EXPIRED?

For "GitHub Copilot CERT_HAS_EXPIRED SSL Certificate Error", avoid applying "Compare the failing environment with a known working setup, then change one configuration value at a time." when the error text differs, the affected version or provider is different, or the change would touch credentials, billing, DNS, production deploy settings, or irreversible data.

What should I collect before debugging CERT_HAS_EXPIRED?

For "GitHub Copilot CERT_HAS_EXPIRED SSL Certificate Error", collect the failing GitHub Copilot command or request, non-secret configuration, versions, timestamps, request IDs when available, and the smallest reproduction that still triggers the signature.