When a collaboration is deleted in vantage6, the linked resources (such as tasks from that collaboration) are not properly deleted.

This is partly to manage data properly, but also to prevent a potential (but unlikely) side-effect, where if a collaboration with id=10 is deleted, and subsequently a new collaboration is created with id=10, the authenticated users in that collaboration could potentially see results of the deleted collaboration in some cases, resulting in information disclosure.

References

• GHSA-rf54-7qrr-96j6
• https://nvd.nist.gov/vuln/detail/CVE-2023-41881
• vantage6/vantage6#748
• https://github.com/vantage6/vantage6/blob/0682c4288f43fee5bcc72dc448cdd99bd7e57f76/docs/release_notes.rst#400
• vantage6/vantage6@cce9538
• https://github.com/pypa/advisory-database/tree/main/vulns/vantage6/PYSEC-2023-200.yaml