CVE-2026-27803: Vaultwarden's Collection Management Operations Allowed Without `manage` Verification for Manager Role

March 4, 2026

Testing confirmed that even when a Manager has manage=false for a given collection, they can still perform the following management operations as long as they have access to the collection:

PUT /api/organizations/<org_id>/collections/<col_id> succeeds (HTTP 200)
PUT /api/organizations/<org_id>/collections/<col_id>/users succeeds (HTTP 200)
DELETE /api/organizations/<org_id>/collections/<col_id> succeeds (HTTP 200)

References

github.com/advisories/GHSA-h4hq-rgvh-wh27
github.com/dani-garcia/vaultwarden
github.com/dani-garcia/vaultwarden/security/advisories/GHSA-h4hq-rgvh-wh27
nvd.nist.gov/vuln/detail/CVE-2026-27803

Code Behaviors & Features

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