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# x509: certificate signed by unknown authority
- URL: https://debugly.dev/x509-certificate-signed-by-unknown-authority/
- Published: 2025-10-14T14:00:00.000Z
- Updated: 2026-10-17T05:49:34.000Z
- Description: Your browser trusts the certificate and your application does not. They use different trust stores, and inside a container there may not be one at all.
- Author: Rohit Bhadani
- Tags: Networking, Docker, Error Autopsy, DevOps

| Code | Meaning                                                               |
| ---- | --------------------------------------------------------------------- |
| 0    | Verified                                                              |
| 10   | Certificate has expired                                               |
| 18   | Self signed certificate                                               |
| 19   | Self signed certificate in chain, usually a proxy                     |
| 20   | Unable to get local issuer, missing intermediate or missing CA bundle |
| 21   | Unable to verify the first certificate, incomplete chain              |

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