NODE_EXTRA_CA_CERTS Environment variable not working

[georgggg]

Preflight Checklist

• I have searched existing issues and this hasn't been reported yet
• This is a single bug report (please file separate reports for different bugs)
• I am using the latest version of Claude Code

What's Wrong?

After starting Claude Code and while trying to use it I ran into an error and cannot use it
"Unable to connect to API: Self-signed certificate detected. Check your proxy or corporate SSL certificates"

What Should Happen?

I should be able to start and use Claude Code normally

Error Messages/Logs

"Unable to connect to API: Self-signed certificate detected. Check your proxy or corporate SSL certificates"

Steps to Reproduce

Since I am running it behind a custom VPN which ships a custom self signed ROOT CA Certificate, trying to solve it I implemented the steps described in the official documentation:
https://code.claude.com/docs/en/settings#configuration-scopes
https://code.claude.com/docs/en/network-config#custom-ca-certificates

and added the following configuration to the ~/.claude/settings.json file:

"env": {
"NODE_EXTRA_CA_CERTS": "C:/Users/UserName/Desktop/CUSTOM_SYSTEM_CONFIGS/CUSTOM_CERTS/SOMENetworks-ROOT-CA-CERT.cer"
}

Then restarted bash and tried to use claude, only to face the same error. After bypassing SSL security I managed to use a Clause session and tried to debug the error, then I got the following insights:

Which suggests that this is an issue that must be corrected in the Claude Code product.

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

No response

Claude Code Version

2.1.47

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

No response

[github-actions]

Found 3 possible duplicate issues:

1. [BUG] NODE_EXTRA_CA_CERTS is not effective when set in ~/.claude/settings.json #22512
2. [BUG] SELF_SIGNED_CERT_IN_CHAIN Error: Extension Fails in Corporate Proxy Environment (Zscaler) #25084
3. [BUG] Native Claude Code not using system certs on MacOS #20194

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
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🤖 Generated with Claude Code

[github-actions]

This issue has been automatically closed as a duplicate of #22512.

If this is incorrect, please re-open this issue or create a new one.

🤖 Generated with Claude Code

[github-actions]

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.