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CVE-2025-64481 — Open redirect endpoint in Datasette

Affected: simonw datasette

Datasette is an open source multi-tool for exploring and publishing data. In versions 0.65.1 and below and 1.0a0 through 1.0a19, deployed instances of Datasette include an open redirect vulnerability. Hits to the path //example.com/foo/bar/ (the trailing slash is required) will redirect the user to https://example.com/foo/bar. This problem has been patched in both Datasette 0.65.2 and 1.0a21. To workaround this issue, if Datasette is running behind a proxy, that proxy could be configured to replace // with / in incoming request URLs.

GHSA-w832-gg5g-x44m — Open redirect endpoint in Datasette

Affected: PyPI: datasette

### Impact

Deployed instances of Datasette prior to `0.65.2` and `1.0a21` include an open redirect vulnerability.

Hits to the path `//example.com/foo/bar/` (the trailing slash is required) will redirect the user to `https://example.com/foo/bar`.

### Patches

This problem has been patched in both Datasette `0.65.2` and `1.0a21`.

### Workarounds

If Datasette is running behind a proxy that proxy could be configured to replace `//` with `/` in incoming request URLs.

PYSEC-2025-73

Affected: PyPI: datasette