CVE-2026-25517: Wagtail has improper permission handling on admin preview endpoints
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.
References
- github.com/advisories/GHSA-4qvv-g3vr-m348
- github.com/wagtail/wagtail
- github.com/wagtail/wagtail/commit/01fd3477365a193e6a8270311defb76e890d2719
- github.com/wagtail/wagtail/commit/5f09b6da61e779b0e8499bdbba52bf2f7bd3241f
- github.com/wagtail/wagtail/commit/73f070dbefbd3b39ea6649ce36bd2d2a6eef2190
- github.com/wagtail/wagtail/commit/7dfe8de5f8b3f112c73c87b6729197db16454915
- github.com/wagtail/wagtail/commit/dd824023a031f1b82a6b6f83a97a5c73391b7c03
- github.com/wagtail/wagtail/releases/tag/v6.3.6
- github.com/wagtail/wagtail/releases/tag/v7.0.4
- github.com/wagtail/wagtail/releases/tag/v7.1.3
- github.com/wagtail/wagtail/releases/tag/v7.2.2
- github.com/wagtail/wagtail/releases/tag/v7.3
- github.com/wagtail/wagtail/security/advisories/GHSA-4qvv-g3vr-m348
- nvd.nist.gov/vuln/detail/CVE-2026-25517
Code Behaviors & Features
Detect and mitigate CVE-2026-25517 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →