CSRF tokens leaked in URL by canned query form
Impact
The HTML form for a read-only canned query includes the hidden CSRF token field added in #798 for writable canned queries (#698).
This means that submitting those read-only forms exposes the CSRF token in the URL - for example on https://latest.datasette.io/fixtures/neighborhood_search submitting the form took me to:
https://latest.datasette.io/fixtures/neighborhood_search?text=down&csrftoken=CSRFTOKEN-HERE
This token could potentially leak to an attacker if the resulting page has a link to an external site on it and the user clicks the link, since the token would be exposed in the referral logs.
Patches
A fix for this issue has been released in Datasette 0.46.
Workarounds
You can fix this issue in a Datasette instance without upgrading by copying the 0.46 query.html template into a custom templates/ directory and running Datasette with the --template-dir=templates/ option.
References
Issue 918 discusses this in details: https://github.com/simonw/datasette/issues/918
For more information
Contact swillison at gmail with any questions.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | datasette | < 0.46 | 0.46 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N- Weakness (CWE)
CWE-200- Platform
- Python (PyPI)
- Package
datasette- Disclosed
- 11.08.2020
- Updated
- 11.10.2026 12:18
Sources and licenses
OSV / GitHub Advisory Database - GHSA-q6j3-c4wc-63vw - CC BY 4.0
Vulnerability history: datasette
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 08.2020 11.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 3
- Low 1
Disclosures per year
- 2020: 1
- 2021: 1
- 2022: 0
- 2023: 1
- 2024: 0
- 2025: 1
- 2026: 0
-
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