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panavenue merged 3 commits into from
Oct 14, 2025
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fix: add important message to readme that show incompatibility with c… #1028

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fix: add important message to readme that show incompatibility with c…
panavenue Oct 13, 2025
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panavenue Oct 13, 2025
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panavenue Oct 14, 2025
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8 changes: 8 additions & 0 deletions README.md
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Expand Up @@ -39,6 +39,14 @@ guide](./migration-guide.md).

For a quick example, try out the Go Connector in a [Codelab][codelab].


> [!WARNING]
> **Go versions 1.25.2 and 1.24.8 are NOT compatible with Cloud SQL Go Connector.**
>
> A recent update to the Go version 1.25.2 and Go 1.24.8 breaks SAN verificaton in Go Connector. This is because Cloud SQL includes a trailing dot in the DNS name within the certificate's Subject Alternative Name (SAN), which the above Go versions reject as a malformed DNS name.
>
> For more details, please see the related Go issue: [crypto/x509: quadratic complexity when checking name constraints ](https://github.com/golang/go/issues/75715).

## Installation

You can install this repo with `go get`:
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