Weiko
a5108d512f
## Summary
- Reject filter conditions that target fields without read access,
including relation traversals
- Add unit and integration coverage for denied field filter access
The issue is an information leak through filtering: a user who cannot
read a field can still infer its values from totalCount
### Manual reproduction
- Create or use a non-admin role.
- Give it read access to People records.
- Disable read access to the Person jobTitle field.
- Assign a test member to that role.
- Authenticate as that member.
Run:
```gql
query People($filter: PersonFilterInput) {
people(filter: $filter, first: 0) {
totalCount
}
}
Variables:
{
"filter": {
"jobTitle": {
"like": "Par%"
}
}
}
```
Ensure at least one Person has a matching jobTitle.
Before the fix, the request succeeds:
```gql
{
"data": {
"people": {
"totalCount": 1
}
}
}
```
The caller can probe restricted values using different filters.
After the fix, it returns a permission error:
```gql
{
"errors": [
{
"message": "Permission denied"
}
]
}
```
The same should happen through a relation filter, for example filtering
Companies by a restricted Person field:
```gql
query Companies($filter: CompanyFilterInput) {
companies(filter: $filter, first: 0) {
totalCount
}
}
{
"filter": {
"people": {
"jobTitle": {
"like": "Par%"
}
}
}
}
```
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