Wagtail has improper permission handling on admin preview endpoints
Impact
Due to a missing permission check on the preview endpoints, a user with access to the Wagtail admin and knowledge of a model's fields can craft a form submission to obtain a preview rendering of any page, snippet or site setting object for which previews are enabled, consisting of any data of the user's choosing. The existing data of the object itself is not exposed, but depending on the nature of the template being rendered, this may expose other database contents that would otherwise only be accessible to users with edit access over the model. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin.
Patches
Patched versions have been released as Wagtail 6.3.6, 7.0.4, 7.1.3 and 7.2.2. The new 7.3 feature release also incorporates this fix.
Workarounds
No workaround is available.
Acknowledgements
Many thanks to @thxtech for reporting this issue.
For more information
If there are any questions or comments about this advisory:
- Visit Wagtail's support channels
- Send an email to security@wagtail.org (view our security policy for more information).
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | wagtail | < 6.3.6, >= 6.4rc1, < 7.0.4, >= 7.1rc1, < 7.1.3, >= 7.2rc1, < 7.2.2, >= 7.3rc1, < 7.3 | 6.3.6, 7.0.4, 7.1.3, 7.2.2, 7.3 |
References
- https://github.com/wagtail/wagtail/security/advisories/GHSA-4qvv-g3vr-m348
- https://nvd.nist.gov/vuln/detail/CVE-2026-25517
- https://github.com/wagtail/wagtail/commit/01fd3477365a193e6a8270311defb76e890d2719
- https://github.com/wagtail/wagtail/commit/5f09b6da61e779b0e8499bdbba52bf2f7bd3241f
- https://github.com/wagtail/wagtail/commit/73f070dbefbd3b39ea6649ce36bd2d2a6eef2190
- https://github.com/wagtail/wagtail/commit/7dfe8de5f8b3f112c73c87b6729197db16454915
- https://github.com/wagtail/wagtail/commit/dd824023a031f1b82a6b6f83a97a5c73391b7c03
- https://github.com/wagtail/wagtail
- https://github.com/wagtail/wagtail/releases/tag/v6.3.6
- https://github.com/wagtail/wagtail/releases/tag/v7.0.4
- https://github.com/wagtail/wagtail/releases/tag/v7.1.3
- https://github.com/wagtail/wagtail/releases/tag/v7.2.2
- https://github.com/wagtail/wagtail/releases/tag/v7.3
- https://pypi.org/project/wagtail
- https://github.com/advisories/GHSA-4qvv-g3vr-m348
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-862- Platform
- Python (PyPI)
- Package
wagtail- Disclosed
- 03.02.2026
- Updated
- 11.10.2026 13:18
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-2030 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-4qvv-g3vr-m348 - CC BY 4.0
Vulnerability history: wagtail
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
- 30
- First → latest
- 04.2020 08.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 5
- Medium 22
- Low 3
Disclosures per year
- 2020: 3
- 2021: 2
- 2022: 1
- 2023: 3
- 2024: 3
- 2025: 0
- 2026: 18
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Wagtail has improper permission handling on admin preview endpoints this entry
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