MEDIUM5.4

PYSEC-2026-1229

Improper Access Control in janeczku/calibre-web

Quick fix

PYSEC-2026-1229 — calibreweb: upgrade to the fixed version with the command below.

pip install --upgrade 'calibreweb>=0.6.15'

Details

An improper access control vulnerability exists in janeczku/calibre-web. The affected version allows users without public shelf permissions to create public shelves. The vulnerability is due to the `create_shelf` method in `shelf.py` not verifying if the user has the necessary permissions to create a public shelf. This issue can lead to unauthorized actions being performed by users.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/calibreweb

Introduced in: 0Fixed in: 0.6.15

Fixpip install --upgrade 'calibreweb>=0.6.15'

References

https://nvd.nist.gov/vuln/detail/CVE-2021-3987[ADVISORY]
https://github.com/janeczku/calibre-web/commit/bcdc97641447965af486964537f3821f47b28874[WEB]
https://github.com/janeczku/calibre-web[PACKAGE]
https://huntr.com/bounties/29fcc091-87b6-43bc-ab4b-3c0bec3f71df[WEB]
https://pypi.org/project/calibreweb[PACKAGE]
https://github.com/advisories/GHSA-fj5v-w2jp-wqvj[ADVISORY]