Vulnerability · Published May 13, 2026 · Assigned by GitHub_M

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

Medium 6.1

In plain English

A medium-severity cross-site request forgery in ckan from ckan. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.1%top 97.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	ckan	2.10.10	GHSA-mcvf-jxcw-vj73
PyPI	ckan	2.11.5	GHSA-mcvf-jxcw-vj73
PyPI	ckan	2.10.10, 2.11.5	PYSEC-2026-2418

Affected products (as reported)

Vendor	Product	Versions
ckan	ckan	>= 2.11.0, < 2.11.5< 2.10.10

Weakness: CWE-352 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

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