CVE-2026-41255 CKAN: CSRF exemption primed by anonymous requests
An unauthenticated request can permanently disable CSRF protection for a server worker, allowing attackers to bypass CSRF defenses in CKAN data portals.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-41255?
CVE-2026-41255 is a medium-severity vulnerability in ckan, published on 13 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
CKAN is an open-source DMS (data management system) for powering data hubs and data portals. Prior to 2.10.10 and 2.11.5, Access to the views via tokens or unauthenticated requests marked the endpoint as not requiring CSRF protection. The marking was a member variable in flask-wtf.csrf.CSRFProtect(), which was stored as a module level variable in the flask_app middleware. This API was never intended for request level changes, it is primarily a decorator for static configuration. An unauthenticated request could hit a protected endpoint, exempting it from CSRF protection for the life of the particular server process. (e.g. one worker of uwsgi). This vulnerability is fixed in 2.10.10 and 2.11.5.
Weakness: CWE-352
Which versions are affected by CVE-2026-41255?
5 open source packages ship an affected version, including ckan. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
ckan PyPI | From 2.10.0 | 2.10.10, 2.11.5 |
ckan PyPI | From 2.10.0 | 2.10.10 |
ckan PyPI | From 2.10.0 | 2.10.10 |
ckan PyPI | From 2.11.0 | 2.11.5 |
ckan PyPI | From 2.11.0 | 2.11.5 |
Products include Okfn Ckan.
How do I fix CVE-2026-41255?
Upgrade ckan to a fixed version for your release line: 2.10.10 or 2.11.5.
Is CVE-2026-41255 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41255 exists.
Other vulnerabilities in ckan
- CVE-2023-32321 CKAN remote code execution and private information access via crafted resource ids
- CVE-2023-32696 Excessive permissions for ckan user
- CVE-2022-43685 CKAN contains Improper Authentication leading to account takeover
- CVE-2023-22746 CKAN is vulnerable to session secret shared across instances using Docker images
- CVE-2026-42031 CKAN: Unauthenticated SQL Injection and Authorization Bypass in `datastore_search_sql`
Sources
Also known as GHSA-mcvf-jxcw-vj73, PYSEC-2026-2418.