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npm SSL self signed certificate in chain

npm ERR! Error: SSL Error: SELF_SIGNED_CERT_IN_CHAIN

npm received a self-signed certificate in the SSL chain, often due to outdated npm certificate handling or an intercepting corporate proxy.

SELF_SIGNED_CERT_IN_CHAINnetworking

Observed message

npm ERR! Error: SSL Error: SELF_SIGNED_CERT_IN_CHAIN

Why it happens

  • The current npm version does not trust the certificate chain in use.
  • A proxy is intercepting SSL traffic and presenting its own certificate.
  • Local CA configuration does not match the registry connection path.

How to fix it

  1. Upgrade npm if the active version is outdated.
  2. Reset or review the npm ca configuration as documented.
  3. If the error persists, investigate whether an SSL-intercepting proxy is in the network path.

Official reference

npm Docs: Common errors

Related errors

npm only uses git: and ssh+git: URLs for GitHub repos, breaking proxiesnpm GitHub git and ssh URLs are breaking behind a proxySSL-intercepting proxynpm is behind an SSL-intercepting proxyCERT_UNTRUSTED / UNABLE_TO_VERIFY_LEAF_SIGNATUREnpm SSL certificate is untrusted or leaf signature cannot be verifiedSSL23_GET_SERVER_HELLO:unknown protocolnpm SSL unknown protocol error

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npm SELF_SIGNED_CERT_IN_CHAIN: causes and fixes | Error Atlas